We need answer legal/factual. Need compute. Need be careful. Need include calculations. Let's parse problem.

We represent Mira Sol in property division. Evan disclosed one crypto wallet only after tax records exposed it and claims most assets premarital. We need trace supplied transactions, calculate marital and separate shares, identify discovery needed for unexplained second wallet.

Governing law rules as enumerated. We apply.

Facts:

At marriage, Evan owned 8 BTC. Complete exchange records prove premarital ownership.

During marriage, Evan used $120,000 from a joint account to buy 4 additional BTC. He combined all 12 BTC in one wallet. No unit-specific identifiers distinguish premarital and marital BTC after commingling.

Need separate/marital proportions when 8 premarital and 4 marital BTC combined. Since 8 separate units and 4 marital units in common wallet. Without identifiers, proportional 8/12 = 2/3 separate, 4/12 = 1/3 marital. Need maybe market value at purchase? Wait if marriage bought 4 BTC for $120,000? They state used $120,000 from joint account to buy 4 additional bitcoin. Could be at price $30k each, but not necessary? Need for calculation maybe marital contribution $120,000, but classification proportion based on units 4 BTC / 12 total? In tracing, when separate property exchanged into BTC or purchased? Since 8 BTC owned before marriage separate; marital funds bought 4 BTC. Combined no ID => 2/3 separate, 1/3 marital. Need maybe if asset prices changed, the separate and marital proportions of the mixed pool: 8/12 and 4/12. Not value-based? There is no issue of reimbursement? Let's see.

Evan later sold 3 BTC. The sale proceeds went to joint checking and spent on ordinary household expenses. We need character of 3 BTC sale and remaining 9 BTC.

At sale, mixed pool 12 BTC, 2/3 separate, 1/3 marital. Sale of 3 BTC deemed draws proportionally from pool due to no unit-specific tracing. Thus 3 BTC sale is (2/3 separate = 2 BTC) separate and (1/3 marital = 1 BTC) marital. Proceeds went to joint account and spent on ordinary household expenses. Under rule 6: proceeds spent on ordinary marital expenses are not reimbursed. But classification? Rule? It says property? "Proceeds spent on ordinary marital expenses are not reimbursed to either spouse absent agreement." So the sale proceeds consumed, no remaining asset; maybe separate share consumed cannot be reimbursed. But might need character of sale? Since ordinary expenses, no claim. The remaining 9 BTC after sale retains same proportional separate and marital character? Let's compute after sale. Did sale reduce separate and marital proportionally. 12 pool with 8 separate, 4 marital. Sell 3 (2 separate, 1 marital). Remaining if identifiable: 6 separate and 3 marital? Let's compute proportions: remaining 9 BTC: separate = original 8 - 2 = 6; marital = 4 - 1 = 3. Proportions 6/9 = 2/3 separate; 3/9 = 1/3 marital. Yes same proportions. But wait sale proceeds spent; under rule 6 not reimbursed, but does the marital/separate estate bear the expense proportionally? If proceeds spent on ordinary marital expenses, no reimbursement to either spouse. It doesn't create a right to claw back separate share from marital estate. So remaining 9 retains 2/3 separate, 1/3 marital. Good.

Then exchange 6 of remaining 9 BTC for 90 ETH, retained 3 BTC. Need character of 6 BTC exchange into 90 ETH. Since pool remaining 9 has 2/3 separate and 1/3 marital. Exchange 6 BTC for 90 ETH: the 6 BTC had same proportional character (2/3 separate = 4 BTC; 1/3 marital = 2 BTC). Under rule 4, the 90 ETH takes the proportional character of the asset surrendered: 2/3 separate, 1/3 marital. That means 60 ETH separate, 30 ETH marital. Remaining 3 BTC after exchange retains same proportions? Let's compute: remaining 9 pool after sale was 6 sep, 3 marital. Exchange 6 BTC from pool: proportional 4 separate, 2 marital. Remaining 3 BTC: 2 separate? Wait 6 sep - 4 =2, 3 mar -2 =1. 2/3 separate, 1/3 marital. Yes.

Known traced holdings: 3 BTC and 90 ETH total (30 ETH cold wallet + 60 ETH original? Actually statements: then exchanged 6 of remaining 9 BTC for 90 ether and retained 3 BTC. Later transfers moved 30 of the 90 ether to a cold wallet. Both wallets identified, so known traced holdings remain 3 BTC and 90 ETH in total. The 90 ETH total after 30 moved, 60 in original? Need yes. No character change due to wallet transfer. Character of each: 3 BTC: 2/3 separate, 1/3 marital = value? BTC $50k: 3 BTC = $150,000. Separate $100k; marital $50k. But also there had already been sale of 3 BTC spent; maybe no value now.

90 ETH at $3k = $270,000. Proportional: 2/3 separate = $180,000; 1/3 marital = $90,000. Known total $420,000? Wait 3 BTC $150k + 90 ETH $270k = $420k. Separate: 2/3 of all known = $280k? Let's compute: 3 BTC: sep $100k, mar $50k. 90 ETH: sep $180k, mar $90k. Total sep $280k; marital $140k. Yes.

Mira's one-half share of known marital crypto: $70,000 (half of $140k), assuming no other factors, and Evan gets other half (plus separate). But wait if there is sale proceeds consumed, no remaining. Did sale of 3 BTC produce proceeds used for household expenses. We don't value sale at time? At valuation date, sold 3 BTC gone; no reimbursement. Character and amounts maybe for computation? The sale of 3 BTC at whatever price? But facts don't give sale price. Could calculate if sale of 3 from pool = 2 separate, 1 marital, proceeds spent on ordinary expenses no reimbursement. The remaining known amount is as above.

Need consider whether sale of 3 BTC itself during marriage is marital property? If bitcoin separate and marital mixed, sale proceeds are proportional. Since spent on ordinary expenses, no reimbursement. But if Evan sold 3 BTC (2 separate and 1 marital) and used all to household expenses, perhaps the marital component was spent on marital expenses, and the separate component was gifted to marital use? Rule 6 says proceeds spent on ordinary marital expenses are not reimbursed. So both separate/marital components? It says not reimbursed to either spouse. Thus no separate reimbursement to Evan for the 2 BTC separate portion spent. That prevents reducing marital pool. Good.

Second undisclosed wallet: contains another 40 ETH worth $120,000 (at valuation date; 40*3k=120k). Evan omitted from sworn disclosure. Tax records show 40 ETH arrived during marriage from external address. Evan says brother gave it to him, but no exchange statements, donor wallet records, gift message, or brother testimony produced. Need provisional classification. Rule 7: property found in undisclosed wallet during marriage presumptively marital unless holder traces separate source. A claimed gift requires evidence of donor intent and transaction source. Since it arrived during marriage and external; unsupported gift claim not enough. No separate source tracing. Therefore provisional classification: marital. Unless he later proves gift with donor intent and source? But a gift from brother to Evan would be separate property? Need under law? "A claimed gift requires evidence of donor intent and transaction source." It arrived during marriage. Property acquired during marriage is presumed marital unless supplied exception proved. Gifts are generally separate? Under many states, gifts to one spouse are separate. Here governing law: "Property acquired during marriage is presumed marital unless a supplied exception is proved." Supplied exceptions? "Property owned before marriage is separate if..." Not "gift" explicitly except rule 7 says claimed gift requires evidence of donor intent and transaction source. So if proved, maybe separate. But no proof. Thus provisional marital. Need say likely marital; if Evan later proves brother gift with sufficient evidence, it could be separate, but currently no.

Mira's share and possible surcharge if second wallet marital and concealment intentional. Wallet value $120,000 (40 ETH * $3,000 = $120k). If marital, Mira's ordinary one-half = $60,000. Because Evan intentionally concealed marital property in sworn disclosure, rule 9 surcharge = 20% of concealed marital property's value in addition to ordinary division. 20% of $120,000 = $24,000. So Mira would receive ordinary marital half $60,000 + concealment surcharge $24,000 = $84,000 as to this wallet? Need nuance: The surcharge awarded to other spouse "equal to 20 percent of concealed marital property's value, in addition to ordinary division." Does that mean from Evan's share? If the court awards Mira a surcharge equal to 20% of concealed marital property's value, plus ordinary division. If second wallet is marital asset, total marital estate includes $120k. Ordinary division: Mira gets $60k, Evan gets $60k. Additionally, Evan pays Mira $24k surcharge, reducing Evan's net to $36k; Mira total $84k. But is surcharge on concealed property's value separate from ordinary division? It says "in addition to ordinary division." Yes. Need maybe not include as "share" but "Mira's recovery concerning the wallet: $60,000 half + $24,000 surcharge = $84,000; Evan's net = $36,000 (assuming surcharge payable from his share)." But if no separate funds? Could adjust.

Need maybe include second wallet in total known marital? Let's consider final total marital if second wallet marital and surcharge: Known traceable 3 BTC + 90 ETH marital components: 3 BTC: 1/3 of 3 =1 BTC marital value $50k. 90 ETH: 1/3 = 30 ETH marital value $90k. Total marital known (excluding second) = $140k. Second wallet = $120k marital. Total marital = $260k. Mira's ordinary half = $130k. Plus 20% surcharge of $120k = $24k = $154k? Wait if surcharge applies only second wallet and in addition to ordinary division, yes. But if the court imposes surcharge, perhaps total recovery = ordinary half of all marital assets $130k + surcharge $24k = $154k. Known crypto ordinary half from known = $70k. Second wallet ordinary half = $60k. Total ordinary half = $130k. Surcharge = $24k. Total Mira = $154k. But be careful: If surcharge is paid by Evan, his ordinary share total $130k, after surcharge $106k. Mira gets $154k. But if surcharge is an additional award "in addition to ordinary division" maybe yes. Need compute not double count? Alternative "Mira's share and possible concealment surcharge if the second wallet is marital and concealment intentional." They might ask share of second wallet plus surcharge only (not all crypto). We can present both.

Need also identify exact exchange, wallet, donor evidence still needed. Need "targeted forensic order" and "exact exchange, wallet, and donor records". Need enumerate:

For main wallet/commingled tracing:
- Exchange/deposit/withdrawal records for initial 8 BTC premarital (already complete? facts say complete exchange records prove premarital ownership; maybe no more needed? Could say confirm).
- Records for joint account purchase of 4 BTC during marriage: transaction records, exchange statements, bank withdrawal $120k, wallet deposit address, order execution details, confirm purchase linked to joint account.
- Records of all transfers among wallets (hot/cold), including the transfer of 30 ETH to cold wallet; deposit/withdrawal addresses and tx IDs to trace chain from BTC purchase to ETH exchange and cold storage; records of sale of 3 BTC (exchange statements, bank deposit into joint checking, amount, date) to show disposition/spent; wallet addresses and "wallet-to-wallet transfers" (contrary to Evan saying too technical—forensic examiner can trace).
- For 6 BTC -> 90 ETH exchange: exchange records showing the transaction, order, BTC source address, ETH destination address, and fees? Fees? Could affect units; need fee records to account for any crypto consumed by transaction fees. Facts don't mention fees; maybe not needed. But forensic exact records need identify transaction IDs, counterparty/exchange, and all associated addresses.

For 40 ETH second wallet:
- Exchange statements and transaction source for the external address that sent 40 ETH: blockchain forensics to identify source wallet(s), exchange withdrawal records, KYC/account records associated with external address, deposit records to Evan's wallet, transaction hashes, timestamps.
- Donor records: brother's wallet records, brother's exchange/banking records showing acquisition and transfer of 40 ETH, gift message/document, and brother's testimony/affidavit; any gift tax? (not given but maybe).
- Also need Evan's original sworn disclosure and tax information request? Actually "exact evidence still needed": production of complete wallet addresses, public/private? maybe all wallet addresses under Evan's control; exchange account records; donor's wallet/exchange records; forensic tracing report.

Need discuss "Evan says wallet-to-wallet transfers too technical to trace and proposes $50k settlement." We need analyze whether to accept $50,000, settle conditionally, or seek targeted forensic discovery before final division. Based computations: Even ignoring second wallet and based on known assets only, Mira's ordinary half of marital crypto is $70,000—more than $50,000. But the known assets include 3 BTC and 90 ETH with marital component $140k. If her share is $70k. So Evan's $50k settlement is less than her known marital half; plus second wallet likely marital, and surcharge potentially $84k recovery for that wallet; total recovery could be $154k if both included. But wait is known "marital value" indeed $140k? Let's re-evaluate. The original 8 BTC separate; 4 BTC marital. Combined 12. They sold 3, spent. Then exchanged 6 of remaining 9 for 90 ETH. If 6 BTC exchange includes 4 separate + 2 marital. 90 ETH value 270k, marital component 90k. Retained 3 BTC value 150k, marital component 50k. Known total 420k, marital component 140k. Yes.

But maybe a different tracing method: Some jurisdictions require "lowest intermediate balance" or "first in first out" if separate and marital commingled? But rule says proportional if indistinguishable. So yes.

But wait "Evan later sold 3 bitcoin. The sale proceeds went to the joint checking account and were spent on ordinary household expenses. He then exchanged 6 of the remaining 9 bitcoin for 90 ether and retained 3 bitcoin." The sale of 3 from pool leaves 9. But if the 3 sold were maybe deemed from both. We did.

Potential issues: The sale proceeds are spent; rule 6 says no reimbursement to either spouse. But if the sale proceeds included 2 separate BTC, and the funds were spent on ordinary marital expenses, what happens to Evan's separate estate? It is not reimbursed. But for classification of remaining cryptocurrency, the separate/marital proportions might be affected? Wait think deeply. Original pool 12: 8 separate, 4 marital. Sell 3 -> if no unit-specific tracing, sale draws 2 separate, 1 marital. Thus the remaining pool contains 6 separate, 3 marital (2/3 separate, 1/3 marital). But if the sale proceeds were spent on marital expenses, and "proceeds spent on ordinary marital expenses are not reimbursed to either spouse," is the separate component of the spent sale proceeds effectively a contribution to marriage? It doesn't change proportions. So yes.

But what if we instead calculate after sale based on value proportions after sale proceeds? Under proportional rule, sale of 3 out of 12 reduces each class proportionally; remaining is still 2/3 separate, 1/3 marital. Correct.

Need perhaps compute "marital and separate shares" before/after valuation. Let's build table:

At combination:
- Separate 8/12 = 66.6667%; Marital 4/12 = 33.3333%.

Sale of 3:
- Deemed sale: 2 separate, 1 marital; proceeds spent; no remaining asset/reimbursement.
- Remaining 9: 6 separate, 3 marital; same proportions.

Exchange of 6 BTC:
- 6 BTC deemed 4 separate, 2 marital.
- Received 90 ETH: 60 separate, 30 marital.
- Remaining 3 BTC: 2 separate, 1 marital.
Totals after exchange:
- 3 BTC = 2 separate + 1 marital.
- 90 ETH = 60 separate + 30 marital.
At valuation:
- 3 BTC 150k: separate 100k, marital 50k.
- 90 ETH 270k: separate 180k, marital 90k.
Known total: separate 280k, marital 140k.

Then if Evan retains all known crypto and no sale proceeds assets? Under division, Mira's ordinary half of known marital = 70k. But in actual division, she might receive assets or value equalization. Evan's separate $280k remains his.

Need maybe compute "proceeds from sale of 3 BTC" not at valuation? Fact doesn't give sale price. Could use $50k? Wait not; sold before valuation maybe sold at unknown. If sold at, say, $50k each, proceeds 150k spent. But no value. We don't need. However there is a nuance: if the sale happened during marriage and proceeds spent, the marital estate "spent" the proportional separate property and marital property. At divorce, if the sold BTC would have appreciated, no remaining value. But is there any claim for dissipation? Not supplied. No.

Let's think about "Evan used $120,000 from a joint account to buy 4 additional bitcoin." Is joint account marital? Likely joint account during marriage; $120k from joint account is marital funds. It creates marital BTC. But if the joint account had separate funds? Facts say joint account; maybe assume marital. Need perhaps mention unless Evan proves the $120k itself came from separate funds, the purchased 4 BTC are marital. Rule 1? It says marital money used to acquire cryptocurrency creates marital property. Good.

Need "The separate and marital proportions when 8 premarital and 4 marital bitcoin were combined." What if 8 premarital BTC had appreciated by marriage date? No issue. Proportion based on units, not dollar values at combination. But "clear records prove premarital ownership" means 8 BTC separate. Combined with 4 marital in one wallet; no IDs. Use 8:4.

Need "character of the 3 bitcoin sale and remaining 9 bitcoin." The sale of 3 BTC: because no unit tracing, sale removes both types proportionally, not first-in-first-out, not last-in-first-out; 2 separate and 1 marital. Remaining 9: 6 separate, 3 marital. If sale proceeds spent on ordinary expenses under rule 6, no reimbursement, and because spent they are not in the divisible estate. But the "character" is as above. Maybe need identify if sale of 3 BTC after commingling? What if he sold from wallet after purchase; yes.

Need "character of the 6-bitcoin exchange into 90 ether." 6 BTC had 4 separate and 2 marital; 90 ETH takes 60 ETH separate / 30 ETH marital; remaining 3 BTC 2 separate /1 marital. The 90 ETH? Let's use "ETH" not "ether" maybe.

Need "separate and marital value of known 3 BTC and 90 ETH at valuation date." We have.

Need "Mira's one-half share of known marital crypto." $70k. But hold on, if "Evan later sold 3 bitcoin. Sale proceeds went to joint checking and were spent on ordinary household expenses." If the 3 sold included 2 separate + 1 marital; proceeds all spent. Under ordinary division, is Mira entitled to any share of the marital portion of the spent proceeds? Rule 6: "Proceeds spent on ordinary marital expenses are not reimbursed to either spouse absent a separate agreement." It seems no. But if those expenses were ordinary marital expenses, they are gone. So no need valuation. But could there be offset? No. But if the sale was of the mixed pool, after sale the remaining pool had fewer separate/marital units. The sale of 3 reduced the number of BTC; if sold at price lower/higher than valuation, not considered. But does the sale "realize" separate/marital character and if proceeds spent, perhaps the marital/separate proportions of remaining assets? Yes.

Could sale proceeds have been used for ordinary household expenses, but the separate component of 2 BTC was not "marital" and perhaps Evan should be reimbursed? Rule 6 explicitly no. So no.

Potential issue: We are representing Mira. Should we ask for $50k settlement? Let's calculate. The $50k is significantly less than known marital half of $70k, and ignores second wallet. Therefore should not accept outright. Should we settle conditionally? Could accept $50k only as partial/without releasing claims? Or condition settlement on full disclosure and an amount at least $70k plus share/surcharge of second wallet? The assignment: "Whether to accept $50,000, settle conditionally, or seek targeted forensic discovery before final division." We need recommend seek targeted forensic discovery before final division. Maybe if settlement offer is to settle all crypto claims for $50k, reject. But could "settle conditionally" with the $50k as an advance? Need think of litigation strategy.

Given no exchange, wallet, donor records, and tax records reveal a second wallet, and Evan admits transfers but says too technical. Need targeted forensic order before final settlement. Need maybe reject $50k because it's below known marital half and unsupported by tracing. Seek court order compelling:
- Complete disclosure of all wallet addresses/keys/exchange accounts controlled by Evan during marriage.
- Forensic blockchain tracing of all transfers to/from known wallets (the original, cold, second wallet and external source) with transaction hashes.
- Third-party subpoenas/exchange records for the joint account BTC purchase, 3 BTC sale, 6 BTC->90 ETH exchange, 30 ETH cold transfer, and 40 ETH receipt.
- Donor discovery: brother's wallet/exchange records, gift documents, testimony; if needed, nonparty discovery.
- If Evan refuses, seek sanctions and adverse inference; note concealment surcharge.

Maybe "conditional settlement" could be considered? The question asks "Whether to accept $50,000, settle conditionally, or seek targeted forensic discovery before final division." We can say do not accept $50k; if settlement is explored, it should be conditional on complete discovery and payment of at least known-floor plus 20% surcharge and attorney's fees maybe, but the correct step is targeted forensic order. Do not settle for $50k now.

Need be precise with "Mira's share and possible concealment surcharge if second wallet is marital and concealment intentional." Let's compute second wallet alone and total.

Second wallet:
- 40 ETH at $3,000 = $120,000.
- Marital classification: presumptively marital; unsupported gift claim no.
- Mira's ordinary one-half: $60,000.
- 20% surcharge: $24,000.
- Mira's total as to second wallet: $84,000; Evan's net after surcharge: $36,000 if paid from his interest. Need maybe "if surcharge is paid from Evan's share; if paid as additional judgment, Evan's share is reduced accordingly."

If all known + second wallet:
- Total marital values:
  - From known commingled holdings: $140,000.
  - Second wallet: $120,000.
  - Total marital: $260,000.
- Mira ordinary half: $130,000.
- Concealment surcharge: $24,000 (20% of second wallet).
- Total Mira: $154,000 (unless second wallet is somehow separate, but currently not).
- Evan total ordinary half: $130,000 less surcharge = $106,000, plus his separate $280,000 = $386,000? Wait if he receives all crypto perhaps plus separate. But no need. Actually if all marital $260k divided equally, each $130k. Evan owes surcharge $24k; if from Evan's marital share, Evan gets $106k. His separate remains $280k (known). Total net to Evan including separate $386k, Mira $154k. But if the court distributes assets in kind, could allocate second wallet or other assets. Need not.

But wait, in total values, known separate = $280k. Total known assets including second = $420k + $120k = $540k. If second is marital, total marital = $260k, separate = $280k. Mira gets $154k (ordinary half $130k + surcharge $24k), Evan gets $386k. The sum $540k. Yes.

Need check whether concealment surcharge should apply to "concealed marital property's value" perhaps if second wallet is marital and "intentional concealment" found. The facts say "Evan omitted that wallet from his sworn disclosure. Tax records show..." and "Evan says wallet-to-wallet transfers are too technical." Did he intentionally conceal? It says "possible concealment surcharge if the second wallet is marital and concealment intentional." We need condition. We need say if court finds he intentionally concealed, surcharge. We can maybe infer from omission? But no, need "if intentional." Based on facts: omitted from sworn disclosure; he says wallet-to-wallet transfers too technical; tax records reveal; no disclosure until tax request. This supports a finding of intentional concealment, but the formal conclusion is for court. Need phrase: "Given the sworn omission and late disclosure only after tax records, the elements are likely met if the court finds he knew of and intentionally failed to disclose; that finding is necessary for the 20% surcharge."

Need be careful with "Evan says wallet-to-wallet transfers are too technical to trace" and "Evan omitted wallet from sworn disclosure." If he "says too technical" but tax records show; "undisclosed wallet" could be from brother gift. The court may draw adverse inference. But as counsel, preserve.

Need maybe "Mira discovered second wallet through tax information request." It arrived during marriage from external address. Because not reported, he has burden to prove separate source. No proof. Provisional classification marital.

Need maybe "gift" exception: Under rule 7, a gift to either spouse may be separate? The rule says "A claimed gift requires evidence of donor intent and transaction source." But our governing law doesn't explicitly say gifted property to one spouse is separate. It says property acquired during marriage is presumed marital unless "supplied exception" proved. Rule 7 maybe a supplied exception: "Property found in undisclosed wallet during marriage is presumptively marital unless the holder traces a separate source. A claimed gift requires evidence of donor intent and transaction source." That suggests if he can trace a gift from brother (separate source? maybe brother's property), it might be separate; but absent evidence, no. We can state: "Even if a gift to Evan could be separate property, the claimed gift is not established and cannot overcome the presumption; provisional classification marital." Need not decide gift law beyond.

Need maybe discuss "complete exchange records prove premarital ownership" so initial 8 BTC separate. But if there were any "commingling" of "all 12 in one wallet no identifiers", due rule 2/3. Good.

Need maybe account for "marital funds used from joint account to buy 4 BTC" – if joint account held Evan's separate funds? We might need identify evidence needed on source of $120k. Since joint account, but maybe not necessarily marital? It says "joint account" likely marital. "Marital money used ... creates marital property." We can say unless Evan traces $120k to separate source (not supplied), the 4 BTC are marital. Need "exact evidence still needed" include bank records of joint account funding to confirm source. But facts say "from a joint account" not "marital jointly owned account"? In divorce, joint account funds may be marital unless traced. We'll not overcomplicate. But mention "the $120,000 from the joint account is treated as marital until traced otherwise; no contrary tracing is supplied." The purchase price itself ($120k) maybe might create a reimbursement/credit if the marital estate paid for separate asset? Wait, if 4 BTC were acquired during marriage with marital money, they are entirely marital. But after commingled with separate 8, proportion as units. Does the cost of 4 BTC at $120,000 vs value at combination matter? Suppose at time of marriage 8 BTC were worth maybe low; during marriage they buy 4 BTC with $120k. Combined units. Later prices. Proportional by units. If the 8 premarital BTC was separate property, and if at marriage Evan owned 8 BTC, then after using marital money to buy 4 BTC, the pool units separate/marital = 8:4 = 2:1. That's straightforward under rule 3. No need to value at time of marriage.

Potential issue: "During marriage, Evan used $120,000 from a joint account to buy 4 additional bitcoin. He combined all 12 bitcoin in one wallet." If the $120k was marital, the marital share has a cost basis of $120k; separate share has 8 BTC. When he sells 3 later, if sale proceeds spent, any capital gain? Not relevant to property division? Could there be tax liabilities? Not included. No.

Need perhaps include "at valuation date, the known 3 BTC and 90 ETH: 3 BTC = $150,000; 90 ETH = $270,000; combined known crypto $420,000. Of that, $280k separate and $140k marital." Let's compute with table.

Let's format:

1. Initial pool:
- 8 BTC separate, 4 BTC marital
- Separate 8/12 = 66.67%; marital 4/12 = 33.33%
- Unit counts: 8 S, 4 M.

2. Sale of 3:
- Without tracing, each sold BTC is 2/3 S, 1/3 M. 3 BTC sale = 2 S, 1 M.
- Proceeds in joint account spent on household expenses. Under Rule 6, no reimbursement; they vanish from divisible estate in classification (though their character would have been 2 S/1 M).
- Remaining 9 BTC = 6 S, 3 M (same 2/3-1/3).

3. Exchange of 6 of 9:
- 6 BTC from pool = 4 S, 2 M.
- Rule 4: 90 ETH = 60 S, 30 M.
- Remaining 3 BTC = 2 S, 1 M.

4. Valuation:
- 3 BTC: 2 S = $100k; 1 M = $50k; total $150k.
- 90 ETH: 60 S = $180k; 30 M = $90k; total $270k.
- Known totals: S $280k; M $140k; total $420k.

5. Mira known crypto half:
- $70k.

Wait: Is "Mira's one-half share of known marital crypto" perhaps should be one-half of "known marital crypto" after considering sale proceeds spent? The "known marital crypto" is 1 BTC + 30 ETH, value $50k + $90k = $140k. Half = $70k. Yes.

Need perhaps mention "Evan's proposal of $50k would be less than this floor, before considering the second wallet or surcharge." Actually $50k is $20k less than $70k. Plus second.

Need maybe "Mira's share and possible concealment surcharge if second wallet is marital and concealment intentional." Let's separate:

- Second wallet classification:
  - 40 ETH; "arrived during marriage from external address"; Evan omitted from sworn disclosure; no exchange records, donor wallet records, gift message, brother testimony; claimed gift unsupported. Rule 7 => marital.
- Value: $120k.
- Mira ordinary share: $60k.
- 20% surcharge: $24k.
- Mira total attributable to second wallet if intentional concealment: $84k.
- Combined with known half: $154k (if considering all crypto and surcharge only on second) ( $70k + $60k + $24k = $154k). But note if she gets $70k + $84k = $154k. Good.
- If no surcharge, if second wallet marital but concealment not intentional, Mira total = $130k ordinary half of all marital crypto.

Need maybe calculate "total all crypto" after surcharge:
- Total marital value $260k. Ordinary division = $130k each. Surcharge $24k. Mira total $154k; Evan marital net $106k; plus separate $280k = $386k. But is total all crypto includes separate? Total $540k. Check $154 + $386 = $540. Yes.

Need maybe note "The 20% surcharge is calculated on the second wallet's value, not all marital property." Rule 9: "If a spouse intentionally conceals marital property in a sworn disclosure, court may award other spouse surcharge equal to 20 percent of concealed marital property's value." The concealed property is second wallet $120k; $24k. Do not erroneously calculate 20% of total marital $260k = $52k. Need make clear.

Need identify "missing exchange, wallet, and donor records" exact. Let's plan final answer maybe not too verbose but enough. User wants analysis and calculations. We can include headings.

Need maybe mention "Evan says wallet-to-wallet transfers are too technical to trace" – this is not legally sufficient; blockchain forensics can trace; he has burden for separate/gift claims; unsupported self-serving statement isn't clear records. We need perhaps phrase "wallet-to-wallet transfers are exactly what blockchain records trace; his 'too technical' assertion is not proof." The assignment says "identify discovery still needed." We can say targeted forensic order.

Potential nuance: In the second wallet, 40 ETH "arrived during marriage from an external address." If it arrived from brother's external address, but no exchange statements, donor wallet records, gift message, brother testimony. We might need "external address" itself is a wallet record; but need source/exchange KYC. We need discover "the external address's owner" and "the transaction path of the 40 ETH into that external address." If brother claims gift, need brother's records. The 40 ETH might have come from an exchange; need exchange records for the sender (brother) to show he acquired it and intended gift. Need "gift message" maybe on-chain message? Actually Ethereum transactions can include data, but not necessarily "gift message"; perhaps text/email. The rule requires "evidence of donor intent and transaction source" not necessarily written gift message. Need obtain brother's affidavit/testimony, and any contemporaneous documentation. Need also "brother testimony" absent; can subpoena brother or take deposition.

Potential "donor intent" and "transaction source" with 40 ETH: Since brother is a disqualified interested witness? Need not.

Need also "second wallet's own address/private key; tax information request might show receipt but not wallet control. Need discovery to confirm Evan controlled it." Facts say undisclosed wallet; maybe need determine control. Need "wallet records showing the 40 ETH still in the second wallet and no further transfers after valuation; or if transferred, trace to current assets." Important because valuation date fixed; if he transferred after, maybe need trace. We should include.

Potential "valuation date fixed" maybe not given date; use given values. Need "as of valuation date" not actual date. Good.

Potential "Mira discovered second wallet through a tax information request" – tax records maybe show arrival from external address but not source. Need tax records too: perhaps "tax information request" produced forms reporting gross proceeds, not source. Need obtain the underlying tax records. Include "the tax records/1099 or Form 8938? not necessary".

Potential "Evan used $120,000 from a joint account to buy 4 additional bitcoin" – Need exact evidence "joint account funds have no separate character." Maybe if not, but if no records, can ask. But facts complete? "Complete exchange records prove premarital ownership." We can say "Because the 4 BTC purchase was with marital funds, it is marital; to the extent Evan disputes this, he must trace the $120,000 source."

Potential "proceeds of 3 BTC sale spent on ordinary household expenses — no reimbursement" – maybe need "sale of 3 and spent" means those 3 no longer exist. But if sale occurred at a loss/gain, not relevant. "Evan later sold 3 bitcoin. The sale proceeds went to joint checking account and were spent on ordinary household expenses." The sale price? Not given. Does it matter if the sale proceeds were "marital" or "separate"? Under tax/accounting no. For "character of sale" maybe should calculate if sale was from 12 and if sold during marriage. Yes. But if sale proceeds spent, no reimbursement. We can include.

Could there be an alternative: "The 3 bitcoin sale should be characterized as 2 separate and 1 marital; since proceeds were spent on ordinary marital expenses, Mira has no right to reimbursement of the 1 marital BTC; however, in computing remaining pool, the sale does not eliminate the marital claim to the remaining crypto?" Wait if the sale proceeds were from a mixed pool and spent, perhaps the 1 marital bitcoin has been consumed; the remaining 9 still includes 3 marital. But the total marital/separate units: original 8 S, 4 M. Sell 3 = 2 S, 1 M. Remaining 6 S, 3 M. Then exchange 6 = 4 S, 2 M; remaining 3 = 2 S, 1 M. So marital units remain 3? After sale, remaining marital 3. After exchange, the 3 marital are split: 2 in ETH and 1 in BTC? Wait after exchange, 90 ETH has 30 ETH corresponding to 2 BTC marital? Need map: 6 BTC = 4 S + 2 M becomes 90 ETH = 60 ETH (S) + 30 ETH (M). Retained 3 BTC = 2 S +1 M. So marital economic value = 30 ETH +1 BTC. Yes.

Let's maybe compute unit fractions more explicitly:
- 90 ETH for 6 BTC: 90/6 = 15 ETH per BTC. 4 S BTC -> 60 ETH; 2 M BTC -> 30 ETH. Retained 3 BTC: after exchange, remaining 3 BTC correspond to 2 S and 1 M (not necessarily "remaining from original" but proportion).

Potential issue: "retained 3 bitcoin" after exchange may not be the same units, but no identifiers. We trace proportionally.

Potential "Mira's one-half share of known marital crypto" maybe "subject to division, not necessarily in crypto; equalization payment may be used."

Need maybe mention "The 30 ETH cold wallet transfer does not alter character; it remains part of 90 ETH total with 2/3 separate and 1/3 marital."

Let's think if second wallet's 40 ETH might also be subject to proportional tracing if it came from brother? If brother gift to Evan, no commingling with first wallet. It was in separate undisclosed wallet. If gift to Evan is separate, Mira gets no share. But unsupported. Could the 40 ETH perhaps have been bought with marital funds? Tax records show arrived during marriage from external address; source not known. Need discovery. Provisional marital. Good.

Potential "Evan omitted wallet from sworn disclosure" maybe if he didn't disclose because he didn't think it was marital due to gift; but "sworn disclosure" intentional concealment? Need facts; if he intentionally omitted, surcharge. Need mention "the court must find he knowingly and intentionally concealed; the facts support an inference; discovery should test his explanation." Good.

Potential "settle conditionally" maybe maybe should not reject all settlement; could enter into "settlement agreement contingent on disclosure and payment of amounts consistent with the calculations." But because the prompt asks "whether to accept $50,000, settle conditionally, or seek targeted forensic discovery before final division", we can answer "reject $50,000 outright; do not settle conditionally until discovery; seek targeted forensic order." But perhaps we can say "If a conditional settlement is possible, the condition should include full exchange/wallet/donor records and a minimum payment of $154k plus fees, but the immediate step is discovery." Let's decide.

Need maybe include "The $50,000 offer is a bad deal even on known facts" because known half is $70k, second likely adds at least $60k and possibly $24k. If accept, Mira releases all crypto claims for less than the known floor. Rule? She would forgo 20% surcharge and discovery. We should be firm. "Do not accept."

Need maybe phrase "the $50,000 offer appears designed to avoid both the second wallet and the concealment penalty." Good.

Let's think about possible "donor intent" evidence. Under common law, gift of cryptocurrency from brother during marriage to Evan: If gift is to one spouse, it may be separate property; if gift to both, marital. The supplied fact says "his brother gave it to him" not "to both." But no records. The second wallet was undisclosed. Need maybe "Even if Evan proves a gift from brother, the gift may be separate only if it was intended for Evan alone; if the gift was to the marital community, it is marital." But rule 7 says claimed gift requires evidence of donor intent and transaction source. We can mention.

Potential "property found in an undisclosed wallet during marriage is presumptively marital unless holder traces a separate source." The holder is Evan. He must trace source. No records. Could "external address" from tax records show source? No. Need source. Good.

Potential "complete exchange records prove premarital ownership" maybe initial 8 BTC separate. If there are complete records, perhaps no discovery needed for initial 8. But for the "after commingling" transfer, need wallet records. We can list as relevant and not supplied.

Let's perhaps answer in a legal memo style with "To: Mira Sol" maybe not necessary. The prompt says "Your role... Analyze and calculate..." We can write.

Need ensure calculations exact:
- 8/12 = 2/3 = 66.67%, 4/12 = 1/3 = 33.33%.
- 3 sale: 3 * 2/3 = 2 separate; 3 * 1/3 = 1 marital.
- Remaining 9: 9 * 2/3 = 6 separate; 9 * 1/3 = 3 marital.
- 6 exchange: 6 * 2/3 = 4 separate; 6 * 1/3 = 2 marital.
- 90 ETH proportions: 90 * 2/3 = 60 separate; 90 * 1/3 = 30 marital.
- Retained 3 BTC: 2 separate; 1 marital (could compute 9 - 6 =3; 3*2/3=2; 3*1/3=1).
- Values:
  3 BTC = 150,000. Separate = 100,000; marital = 50,000.
  90 ETH = 270,000. Separate = 180,000; marital = 90,000.
  Total known crypto = 420,000. Separate = 280,000; marital = 140,000.
  Mira's half known marital = 70,000.
- Second 40 ETH = 120,000. If marital: ordinary half = 60,000. Surcharge 20% = 24,000. Mira total from second = 84,000. Total with known and surcharge = 70,000 + 60,000 + 24,000 = 154,000. Ordinary half all marital = (140,000 + 120,000)/2 = 130,000. Add surcharge 24,000 = 154,000.
- Evan net: if all marital assets are divided and surcharge taken from Evan's share, Evan gets 130,000 - 24,000 = 106,000 marital, plus 280,000 separate = 386,000. But perhaps not need. But useful "total".

Need maybe compute "Mira's share of second wallet if no surcharge" = $60k. If the court doesn't find intentional concealment, no surcharge; total $130k. Good.

Need maybe compute "Evan's $50,000 settlement" compared:
- Known marital half = $70k; if second wallet marital (even without surcharge) = $130k; with surcharge = $154k. The offer $50k is less than all. Reject. But if litigation cost/risk? The law and facts strong. The only unknown is donor gift; but Evan has burden and no evidence. So reject.

Potential "targeted forensic discovery before final division" should include "a forensic accountant/blockchain analyst" maybe not necessarily "court order" but can seek. Need include "not assume source" per rule 10. Good.

Let's draft final in sections.

But before final, let's think through any hidden trap: The "governing law" #3: "When indistinguishable separate and marital units are commingled and later partially sold without unit-specific tracing, withdrawals and remaining units retain the same proportional separate and marital character as the mixed pool." We applied. Yes.

Rule #4: "An exchange from one digital asset to another does not change character. The acquired asset takes the proportional character of the asset surrendered." We applied.

Rule #2: "Commingling does not automatically destroy a separate claim when the units and later exchanges can be traced." Good.

Potential issue: "At marriage, Evan owned 8 bitcoin. Complete exchange records prove premarital ownership." If the 8 BTC were held in an exchange account at marriage; during marriage, buying 4 additional BTC in same account may not necessarily create a "pool" for FIFO? The facts say he combined all 12 in one wallet; no unit-specific identifiers. Proportional.

Potential issue: Did the 3 BTC sale happen before or after the 4 BTC purchase? "At marriage, owned 8. During marriage, bought 4. Combined. Later sold 3." Yes.

Potential issue: "He later sold 3 bitcoin. The sale proceeds went to the joint checking account and were spent on ordinary household expenses. He then exchanged 6 of the remaining 9 bitcoin for 90 ether and retained 3 bitcoin." Are the 90 ETH and 3 BTC "known traced holdings remain 3 bitcoin and 90 ether in total" exactly, but note he had originally 12, sold 3, exchanged 6, remaining 3; yes all accounted.

Potential issue: The sale of 3 before exchange: The sale price maybe $? not needed. The 3 sold maybe could be considered "withdrew" from pooled wallet; yes withdrawals proportional. Good.

Potential issue: "Proceeds spent on ordinary marital expenses are not reimbursed" – We should perhaps not treat the 3 sold as "divisible" or "gone" in the same sense. The 3 sold no longer available; no reimbursement. But for "character of the 3 bitcoin sale" maybe sale proceeds are separate/marital; but if spent, "any claim for reimbursement of the separate component is barred by Rule 6." Good.

Potential issue: "Mira's one-half share of known marital crypto" If "known traced holdings remain 3 BTC and 90 ETH in total" includes 30 ETH cold wallet; yes. But if the cold wallet is identified, maybe there are two wallets; "known traced holdings remain 3 bitcoin and 90 ether in total." Yes.

Potential issue: "A second undisclosed wallet contains another 40 ether worth $120,000. Evan omitted that wallet from his sworn disclosure. Tax records show that the 40 ether arrived during marriage from an external address. Evan says his brother gave it to him..." If the 40 ETH arrived during marriage from external address, and no exchange statements/wallet records, it's "provisional marital." Could there be "external address" source not "brother's wallet" because an external address can be owned by unknown. Need "donor wallet records" among evidence. Yes.

Potential issue: "The second wallet contains another 40 ether" at valuation date? It says "worth $120,000" at valuation date. Yes.

Potential issue: "Mira discovered the second wallet through a tax information request" The tax information request maybe produced "40 ETH arrived during marriage from external address"; might need "tax records" exact. Use "tax information request/returns" in discovery.

Potential issue: "Evan says wallet-to-wallet transfers are too technical to trace and proposes Mira receive $50,000 to settle all cryptocurrency claims." Maybe $50k offer includes all claims, including second wallet. We can say no because low. But maybe if settlement now with high litigation costs? But no.

Potential "surcharge equal to 20 percent of concealed marital property's value" Could the concealed second wallet value already is marital; if Mira gets 1/2 ($60k) and surcharge $24k, total $84k; if "surcharge" comes from Evan's share, yes. If the court "may" award surcharge, not mandatory. We assume court exercises discretion due intentional concealment. Need mention "if the court exercises its discretion."

Potential "property owned before marriage is separate if the claiming spouse traces it by clear records" Evan claiming 8 BTC; complete records prove. For second wallet, Evan claiming gift separate; no clear records. Good.

Need maybe "The sale of 3 BTC" includes one marital BTC. If sale proceeds spent on ordinary household expenses, no reimbursement to the marital estate? Wait "not reimbursed to either spouse" maybe means if marital funds spent on household expenses, can't be clawed back. Here sale proceeds include marital portion; because spent, not reimbursed. Good.

Potential "Appreciation follows underlying proportional ownership" We apply.

Let's think if "Mira's one-half share of known marital crypto" should maybe be $70,000 but if one spouse used marital money to buy 4 BTC and commingled with separate BTC, and then sold 3 and spent on household expenses, does the "marital estate" get a credit for the $120k contribution? Actually under rule 2, marital money used to acquire cryptocurrency creates marital property. Commingling no automatic destroy. The 4 BTC are marital separate property interests. The proportional division by units means the marital estate's share in the 12 BTC was 1/3. But what if at time of contribution, 4 BTC cost $120,000, and at time of divorce, all 12 BTC value is $600k, so 1/3 marital = $200k. That is a huge return. Good. The $120k expenditure not a loan/reimbursement; it's an ownership interest. We did. No credit issue.

Potential "sale of 3 proceeds spent on ordinary marital expenses" If 3 sold when BTC price maybe, but not specified. If sold before valuation and spent, does the marital estate lose the 1 BTC from sale? Yes because consumed. But what about the remaining 9 includes only 3 marital units? The marital estate originally 4 marital units; one marital unit sold/spent, so no longer in crypto; but if the sale proceeds spent on household expenses, no reimbursement. Thus remaining marital units in crypto are 3 (1 BTC + 30 ETH). Good. But if the sale proceeds were ordinary household expenses, both spouses benefited; no reimbursement. Good.

Potential "known traced holdings remain 3 bitcoin and 90 ether in total" Wait after exchange, 3 BTC + 90 ETH, total value 420k. But original separate 8 BTC had a lot of appreciation; separate share 280k. This is correct.

Potential "Mira's one-half share of known marital crypto" Could be 70k but is this "one-half of marital value after classification" or "one-half of known marital crypto" before "second wallet"? yes.

Need maybe include "Evan's proposal of $50,000" maybe "If he wants to settle, it should be at least the known floor plus a reserve for the second wallet; because the second wallet likely triggers surcharge. But because the total may increase after discovery, a settlement now would be ill-advised." Good.

Potential "targeted forensic order" maybe under Rule 10: "Counsel must identify missing exchange, wallet, and donor records before final settlement and may seek targeted forensic order rather than assume source." We can say "seek a court order under Rule 10, not assume."

Let's prepare final answer in a clear manner. But before final, perhaps there are more nuanced calculations around "separate and marital proportions when 8 premarital and 4 marital bitcoin were combined" after the sale of 3, if "withdrawals and remaining units retain same proportional separate and marital character as the mixed pool." We did. But perhaps "sale of 3 bitcoin" from the pool would be 2.666 separate? Wait wait, let's ensure unit-count math: 12 BTC with 8 S and 4 M. If selling 3 BTC from a pooled but fungible asset, under proportional withdrawal, each unit withdrawn is 2/3 S and 1/3 M. 3 units * 2/3 S = 2 S; 3 * 1/3 = 1 M. Yes. Remaining S 8 - 2 = 6; M 4 - 1 = 3. Good.

But if "sale of 3 bitcoin" occurred after 4 BTC purchase and before exchange, the sales proceeds spent; then exchange of 6 remaining 9. Did we need to "trace" the 3 BTC sale proceeds into joint checking and ordinary expenses? Under rule 6 no reimbursement. Good.

Potential "The exchange of 6 of remaining 9 bitcoin for 90 ether" After sale, 9 remaining had 6 S and 3 M. 6 of 9 = 2/3 of each class? 6 S/9 *6? Let's compute: If selecting 6 BTC from 9 mixed pool, proportion 6/9 = 2/3 of the pool. So it selects 2/3 * 6 S = 4 S; 2/3 * 3 M = 2 M. Yes. Or from remaining 9, the withdrawn 6 are 2/3 S, 1/3 M. Good. The 90 ETH gets 4:2 ratio. Remaining 3: 2 S,1 M. Good.

Potential "both original and cold wallets are now identified, so known traced holdings remain 3 BTC and 90 ETH in total." There is no difference between original and cold. Good.

Potential "second wallet contains another 40 ether" The second wallet is not one of the original/cold wallets. It is an "undisclosed wallet" discovered via tax request. Need separate classification. Good.

Potential "the brother gave it to him" If a gift from brother is a separate property exception? Let's examine. The law says "Property acquired during marriage is presumed marital unless a supplied exception is proved." It only explicitly says property owned before marriage is separate. But "A claimed gift requires evidence..." This rule implies a gift could be separate if proved. But "property found in undisclosed wallet during marriage is presumptively marital unless holder traces separate source." Gift from brother would be a separate source if brother's gift to Evan. But need donor intent: A gift from a third party to one spouse usually is separate property if intent is to give to one spouse; if to both, marital. If Evan's brother "gave it to him" (Evan) maybe separate. But no evidence. We can phrase "A gift is the only possible route to separate treatment; it fails on present record because no donor intent or transaction source has been produced." Good.

Potential "donor wallet records" if brother gave from his wallet, we need trace from brother's wallet into Evan's second wallet. But "external address" may be brother's wallet; need KYC? If the external address is non-custodial, no KYC; but can trace transaction graph and maybe exchange on/off ramps. Need evidence of brother's acquisition of 40 ETH at the time and donative intent. Need brother testimony. Good.

Potential "exact exchange, wallet, and donor evidence still needed" – "exact" maybe they want a list. We should be exact:
- For the 12 BTC pool:
  1. Evan's exchange account statements from before marriage showing the 8 BTC acquisition and withdrawal to the wallet (though complete records already? maybe still need in record).
  2. Joint account records showing the $120,000 withdrawal and the exchange order for 4 BTC; exchange execution reports and wallet deposit records.
  3. The wallet address(es)/xpub for the combined wallet; all transaction hashes (txids) for the 8 BTC deposit, 4 BTC purchase deposit, 3 BTC sale withdrawal, 6 BTC exchange withdrawal/deposit, 90 ETH receipt, 30 ETH transfer to cold wallet, and any subsequent transfers/fees.
  4. Exchange records for the 3 BTC sale (trade date, price, proceeds, destination bank account) and the bank statement showing deposit/spend.
  5. Exchange records for the 6 BTC->90 ETH conversion (including the exchange/counterparty, order ids, fees, addresses, timestamps). Need also identify whether any BTC was consumed as miner/exchange fees; if so, adjust proportions? Rule? Fees would reduce units; proportional. We should mention if fees exist, records are needed to account for them.
  6. Cold wallet address and transfer txid; "original wallet" private/public addresses.
- For second wallet:
  7. The second wallet address and any connected exchange account; tax information/returns supporting receipt of 40 ETH; transaction hash of inbound transfer.
  8. Forensic trace from the external address to identify owner/exchange account; KYC/account records; if external address is brother, brother's wallet/exchange records showing acquisition of the 40 ETH and transfer to Evan.
  9. Donor evidence: brother's affidavit/deposition testimony, any gift document/email/text/memo, gift tax return, and records showing the brother owned and transferred the exact 40 ETH.
  10. A complete sworn supplemental disclosure listing all wallets/exchange accounts, with certifications.

Need maybe "exact exchange, wallet, and donor evidence" – "exchange, wallet, donor" maybe not mention bank? Include bank for joint account and sale proceeds.

Need maybe "targeted forensic order" can include "appoint forensic accountant/blockchain expert" and "third-party discovery to exchanges" and "preservation order for Evan's and brother's records." Could mention.

Potential "Whether to accept $50,000, settle conditionally, or seek targeted forensic discovery before final division." We need answer: "Seek targeted forensic discovery; reject $50k. Do not settle conditionally before discovery because the data will determine the floor; if a conditional settlement is to be considered, it must require disclosure and preserve right to surcharge, but immediate step is court order." Good.

Let's consider if "Mira's share and possible concealment surcharge if the second wallet is marital and concealment intentional" perhaps they only want "if second wallet is marital and concealment intentional, Mira's share of second wallet = 60k; surcharge = 24k; total 84k." We'll include.

Let's maybe formulate final as:

```
At combination:
  Separate 8/12 = 66.67%; Marital 4/12 = 33.33%.
Sale:
  Deemed 2 BTC separate + 1 BTC marital. Proceeds spent; no reimbursement.
  Remaining 9 BTC: 6 S + 3 M.
Exchange:
  6 BTC = 4 S + 2 M. 90 ETH = 60 S + 30 M.
  3 BTC remaining = 2 S + 1 M.
Valuation:
  BTC: 3*50k=150k; S=100k; M=50k.
  ETH: 90*3k=270k; S=180k; M=90k.
  Known marital = 140k; separate = 280k.
  Mira known half = 70k.
```

Then second:
```
40 ETH = 120k. Not traced to separate/gift; provisional marital.
Mira's half = 60k; surcharge = 24k; total with surcharge = 84k.
Combined if second included and surcharge: ordinary half all marital = 130k + surcharge 24k = 154k.
```

Need maybe "Evan's separate share remains 280k." Good.

Potential "Mira's one-half share of known marital crypto" could be "the known marital crypto itself is 1 BTC + 30 ETH; half means 0.5 BTC + 15 ETH? Wait if asset division in kind, Mira may receive half of marital component, but because assets indivisible maybe equalization. We can present value. Do we need "one-half share" in units? Maybe "known marital crypto value at valuation date is $140,000; her one-half is $70,000." Not necessary to identify units. But if we want:
- Known marital crypto consists of 1 BTC (from 3 BTC) and 30 ETH (of 90 ETH), total value $50k + $90k = $140k.
- Mira's half in value = $70k. It doesn't necessarily mean 0.5 BTC and 15 ETH? Actually one-half of each marital component = 0.5 BTC and 15 ETH, value $25k + $45k = $70k. But if assets cannot be split? But yes.

Could include "known marital components: 1 BTC + 30 ETH." Let's see:
Known 3 BTC: 1 BTC marital; known 90 ETH: 30 ETH marital. So marital property = 1 BTC and 30 ETH. Wait "1 BTC + 30 ETH" value = $50k + $90k = $140k. Correct.
Known separate = 2 BTC + 60 ETH. Value = $100k + $180k = $280k.
Mira half = $70k; in kind maybe one-half of the marital undivided interest, not necessarily allocated as half of each asset.

Potential "second wallet if marital = 40 ETH; if included total marital = 1 BTC + 70 ETH? Wait 30 ETH from first + 40 ETH second = 70 ETH. Total marital value = 1 BTC ($50k) + 70 ETH ($210k) = $260k. Yes. Mira ordinary half = 0.5 BTC + 35 ETH value $130k; plus surcharge. But if in kind. Not necessary.

Potential "Evan's proposal $50,000 to settle all cryptocurrency claims" If known marital half $70k and second likely $84k; offer is about one-third of likely recovery ($154k) and below even the no-second floor. Reject.

Need maybe "settle conditionally" maybe "A conditional settlement could be acceptable only if it is not a release and includes:
- full sworn disclosure and records
- minimum payment of known floor $70,000 now
- escrow/reserve for second wallet and surcharge/discovery
But the better course is to seek targeted discovery." Maybe overkill. The prompt asks "Whether to accept $50,000, settle conditionally, or seek targeted forensic discovery before final division." We can answer directly "seek targeted forensic discovery before final division; do not accept the $50,000." We can maybe add "If Evan wants settlement, it must be conditioned on the discovery and an amount at least equal to the likely recovery, not $50,000."

Let's think about "Evan says wallet-to-wallet transfers are too technical to trace" – Need maybe "this is a litigation position, not evidence; blockchain ledgers record wallet-to-wallet transfers. His burden cannot be avoided by claiming complexity; a forensic order can trace." Good.

Potential "Rule 10 counsel must identify missing exchange, wallet, and donor records before final settlement" – The final answer should explicitly identify missing records. We'll list.

Need maybe "Mira's possible share if second wallet is marital but concealment not intentional" maybe "Mira's ordinary half of second wallet = $60k. If no intentional concealment, no surcharge." Good.

Potential "surcharge amount if 'concealed marital property's value' includes appreciation? second wallet value at valuation date = $120k. yes.

Potential "if second wallet is marital and concealment intentional, ordinary division may also include the second wallet as an asset; the court may order transfer of the wallet to Mira or an equalization payment." Good.

Let's maybe produce final with bullet points. Since desired oververbosity 5, not too long but enough.

Double-check "provisional classification" word: "provisional" maybe because the second wallet hasn't been fully traced; currently presumption marital; Evan can rebut. We should say "provisionally marital, subject to his ability to prove a separate gift by clear records." Good.

Potential "the claimed gift requires evidence of donor intent and transaction source" – Need "donor intent" means brother intended to make a gift to Evan (not compensation, not loan, not marital gift, not transfer in exchange). Without brother testimony or contemporaneous gift evidence, no separate classification. The external address can be traced; "external address" not enough. Good.

Potential "Evan omitted wallet from sworn disclosure" – Could "omission" be unintentional because he forgot? But tax records show, and his "too technical" excuse. Need "intentional concealment" not automatic from omission. We need state: "The omission plus late disclosure after tax request supports an inference; the court must find intentional concealment to award surcharge." Good.

Potential "What if the 40 ETH second wallet is a gift from Evan's brother and separate, then Mira's share 0; but because of no evidence, provisional marital. The discovery can test; if he proves gift, then no surcharge because not marital? Actually if he intentionally concealed separate property, no surcharge? Rule 9 applies to marital property. If it turned out separate, no surcharge. But if he intentionally concealed a wallet that he believed was separate, not marital, no. Need maybe not.

Potential "Mira may seek attorney's fees/costs for forensic discovery? Not in rules; not asked. Could mention "and possibly fees/costs" but avoid.

Potential "targeted forensic order" under Rule 10 "rather than assume source." We can say "Do not assume the 40 ETH is from the brother; require proof." Good.

Potential "joint account $120,000" maybe if those funds were used to buy 4 BTC, are they "marital money"? The fact says "During marriage, Evan used $120,000 from a joint account to buy 4 additional bitcoin." In community property, joint account funds earned during marriage are marital; but if account maybe had separate funds? Governing law maybe no separate "joint account" classification. We can say "Because it was a joint account and no contrary tracing is supplied, treat as marital." This nuance can be in one sentence.

Potential "appreciation and depreciation follow underlying proportional ownership" We apply. Good.

Let's maybe final:

```
Subject to the court's factual finding on concealment, the calculations are:
...
```

Need maybe "Mira's one-half share of known marital crypto" is "at least" known? The second wallet not known? Actually known = first wallet. Use "known traced crypto" not "known all." Good.

Potential "proceeds spent on ordinary marital expenses are not reimbursed to either spouse" means if sale proceeds used for household expenses, we don't add back to the marital estate. We'll explicitly say "The 3 BTC are no longer divisible; no add-back/reimbursement." Good.

Potential "sale of 3 BTC character" maybe if sale was from commingled wallet and no unit-specific tracing, "withdrawal and remaining units retain same proportional..." We can cite rule 3. Good.

Potential "exchange of 6 bitcoin into 90 ether" maybe if exchange fees? If 6 BTC exchanged for 90 ETH net of fees? The facts say "exchanged ... for 90 ether", so net. No fee issue. But we can mention "subject to any fee records; none supplied." Maybe not necessary.

Potential "Both original and cold wallets now identified" – For the 30 ETH cold transfer, no character change; just a location change. We'll say.

Let's think if in "complete exchange records prove premarital ownership" of 8 BTC, maybe one could argue 8 BTC are separate but "later exchanges can be traced" by rule 2; yes.

Potential "If a spouse intentionally conceals marital property in a sworn disclosure, the court may award other spouse a surcharge..." Could the surcharge be 20% of all "concealed marital property's value" including the second wallet's $120k. If second wallet is marital and concealment intentional. Yes.

Potential "Mira discovered second wallet through a tax information request" Perhaps this discovery was before final settlement; no issue.

Let's maybe include a "recommended next steps" bullet at end:
1. Reject $50,000.
2. Serve supplemental discovery and motion for targeted forensic order.
3. Seek preservation and production of Evan's and brother's exchange/wallet records; depose brother if needed.
4. After forensic report, recalculate and seek ordinary division plus 20% surcharge if concealment proved.

Need perhaps mention "not settle conditionally" specifically:
- "A $50,000 conditional settlement that releases all claims would be insufficient. The only acceptable path is targeted discovery before final division. If settlement is explored after discovery, it should value the second wallet and surcharge; do not agree to a global release now." Good.

Potential "settle conditionally" maybe "If Evan is offering $50k as an advance or partial payment, it could be accepted only with a written agreement preserving all remaining claims and requiring discovery; otherwise no." But to keep answer crisp, maybe "Do not accept; do not sign any conditional release until evidence produced."

Let's check if any hidden "valuation date fixed" means we should not consider sale price at date of sale; only final values. Good.

Potential "separate and marital proportions when 8 premarital and 4 marital bitcoin were combined." We can maybe "The proportions are based on units, not dollar values. The price paid ($120,000) for 4 BTC does not change the unit ratio." Good to avoid confusion. If at purchase, 4 BTC price is $120k, but at divorce value maybe not; proportions by units because no identifiers and same asset. If the 8 premarital and 4 marital had different cost bases, "appreciation follows underlying proportional ownership." Yes.

Potential "If the 3 BTC sale proceeds spent on household expenses, no reimbursement" – But if the 3 BTC sale included 2 separate BTC, could Evan claim a separate property reimbursement because his separate property was used for marital expenses? The governing law says not reimbursed in this scenario. We'll say.

Potential "second wallet arrived during marriage from external address" – If he says brother gave it, but no donor wallet records, there is no proof it was brother at all. If the source cannot be identified, it is likely marital. Need say "The external address could be a broker/exchange or a third party; donor identity is unknown." Good.

Potential "Evan says wallet-to-wallet transfers are too technical to trace" – Need "blockchain transactions are public and traceable; complexity is not a legal defense. It may justify a forensic expert." Good.

Potential "Mira's share and possible concealment surcharge if second wallet is marital and concealment intentional" We should maybe not "if second wallet is marital" because provisional classification; but yes.

Potential "the exact exchange, wallet, and donor evidence still needed" maybe "exact" use "transaction hashes" not just records. Good.

Let's maybe write final as:

```
MEMORANDUM
Re: Crypto tracing in Sol v. [Evan]
```

Could be overkill but okay. Need not.

Let's formulate final in present tense.

Detailed final draft:

---

**1. Commingled BTC pool**

Initial:
- 8 separate, 4 marital.
- Separate fraction 8/12 = 2/3; marital fraction 4/12 = 1/3.

Sale:
- 3 sold are deemed 2 separate + 1 marital. Proceeds spent, no reimbursement/add-back.
- Remaining 9 = 6 separate + 3 marital.

Exchange:
- 6 BTC surrendered from pool = 4 separate + 2 marital.
- 90 ETH received = 60 separate + 30 marital.
- Retained 3 BTC = 2 separate + 1 marital.

Valuation:
- 3 BTC: 2 separate ($100k), 1 marital ($50k).
- 90 ETH: 60 separate ($180k), 30 marital ($90k).
- Known totals: separate $280k; marital $140k; total $420k.
- Mira's known Marital half: $70k.

**2. Second wallet**

- 40 ETH = $120k.
- Inbound during marriage; no tracing; unsupported gift; provisional marital.
- Mira ordinary share $60k.
- Intentional concealment surcharge 20% x $120k = $24k.
- Mira recovery as to second wallet with surcharge = $84k.
- Overall: ordinary half all marital = ($140k + $120k)/2 = $130k; plus surcharge = $154k.

**3. Settlement**

- Reject $50k. It is below known marital half ($70k), and does not account for second wallet likely $60k plus $24k surcharge. It is not a reasonable settlement.
- Seek targeted forensic order before final division.

**4. Forensic discovery needed**

List.

Need maybe "If second wallet is marital and concealment intentional, Evan's net after surcharge" perhaps include:
- Total marital ordinary split $130k each. Surcharge from Evan: $24k. Evan gets $106k marital + $280k separate = $386k; Mira gets $154k. But if asked "Mira's share..." maybe include.

Let's verify total with surcharge:
Total all crypto value = known 420 + second 120 = 540.
Mira 154; Evan 386. Separate 280; marital after surcharge 106; total 386. Sum 540. Good. If surcharge is not "paid from Evan's share" but additional award reducing total assets? It still sums because transfer from Evan to Mira. Good.

Potential "Mira recovery as to second wallet with surcharge = 84k" maybe if "ordinary half" $60k plus "surcharge" $24k; total $84k. Good.

Potential "The $50k settlement" could be less than "Mira's one-half of known marital crypto" but if $50k is paid to settle all crypto claims, should also consider if known marital half is $70k and second wallet adds at least $84k. If the settlement is paid now and perhaps includes separate property? No.

Potential "settle conditionally" maybe "A conditional settlement could be considered only if the condition is completion of the forensic investigation and the settlement amount is recalculated from the resulting figures; but the immediate recommendation is to seek the order." Good.

Need maybe "targeted forensic order" not "assume source" per Rule 10. Use phrase "A forensic order should be sought rather than accepting Evan's 'too technical' excuse."

Let's maybe include "missing records" in table for clarity.

Potential "exact exchange, wallet, donor evidence" - we can structure:

- Exchange records:
  - The exchange(s)/broker(s) used for the premarital 8 BTC (verify), the $120k purchase of 4 BTC, the sale of 3 BTC, and the 6 BTC→90 ETH exchange, including order tickets, trade confirmations, fee schedules, deposit/withdrawal history, and linked bank accounts.
- Wallet records:
  - All wallet addresses under Evan's control (or keys), including original, cold, second, and any intermediary addresses; transaction hashes for every transfer; blockchain forensic report tracing: 8 BTC deposit → commingled wallet; 4 BTC deposit; 3 BTC sale withdrawal; 6 BTC exchange withdrawal; 90 ETH receipt; 30 ETH cold transfer; 40 ETH receipt to second wallet.
- Donor records:
  - Brother's wallet/exchange records for the 40 ETH; proof brother owned the sending address and/or acquired the ETH; any gift documentation, message, email/text, gift tax return, and brother's testimony/affidavit; also records showing the source of the external address if not brother.
- Financial records:
  - Joint checking account statements around $120k withdrawal, 3 BTC sale proceeds, and ordinary expenses; tax records/returns and information requests.

Need maybe "exact" includes "transaction hashes" and "wallet addresses." Good.

Potential "Evan's brother gave it to him" – If he doesn't produce brother testimony, "adverse inference" may be drawn. We can mention "The court may draw an adverse inference from failure to produce brother/donor records, in addition to the presumption." But not necessary; maybe include as reason to seek discovery.

Potential "surcharge" maybe if concealment is proven, "20% surcharge" could be in addition to ordinary division; but note "may award" not mandatory. We'll state "Assuming the court exercises that discretion." Good.

Potential "Mira's share if second wallet is marital and concealment intentional" Maybe "Mira's share of second wallet is $84,000; but if the court awards the second wallet itself to Mira as part of the division, the surcharge may be in addition, so total recovery from that wallet area is $84,000." Good.

Potential "Known traced holdings remain 3 bitcoin and 90 ether in total" - There was sale of 3 BTC, but "known traced holdings remain 3 bitcoin and 90 ether" maybe after exchange; yes.

Let's perhaps draft final answer in "calculation and analysis" format. Need ensure no unsupported "Evan's separate share" if not asked but okay.

Potential "Complete exchange records prove premarital ownership" – Maybe "the initial 8 BTC are separate but because they were commingled with marital BTC and no unit IDs, the separate claim is not destroyed; it becomes proportional." Good.

Potential "Mira's known marital half" if the 3 BTC sale proceeds spent on ordinary expenses might be "not reimbursed" but what about the sale of 3 "BTC" if sold for cash and cash spent: Does the "sale" of 3 reduce the 2/3 ratio in the remaining pool before the exchange? Yes.

Potential "ordinary marital expenses" no reimbursement "to either spouse" – Means if separate property was used to pay marital expenses, no reimbursement. But if marital property was used to pay marital expenses, no. Good.

Potential "donor records" maybe includes "brother's testimony" absent; "brother" may be a nonparty; can be subpoenaed. Good.

Potential "if the second wallet is marital and concealment intentional, Evan omitted it from sworn disclosure" - We should say "The surcharge is not automatic merely because the wallet was undisclosed; the court must find intent. The facts (sworn omission and disclosure only after tax request) are strong." Good.

Potential "Should we accept $50k" – Maybe "No. It is less than the known floor, and accepting it would waive the undisclosed wallet and concealment remedy. It would also let Evan avoid forensic tracing." Good.

Potential "conditional settlement" – "At most, a settlement could be structured as a partial payment on account, with all rights reserved pending forensic discovery, but the practical answer is no final settlement now." Maybe include.

Let's craft final with headings.

Let's think if there is any need to mention "the separate and marital proportions are by units (BTC and ETH), not by original dollar value; because no identifiers, withdrawals and remaining units retain same proportional character." Good.

Potential issue "at marriage Evan owned 8 bitcoin. Complete exchange records prove premarital ownership." If the 8 BTC were held at an exchange and maybe during marriage, he sold some and repurchased? Facts don't state; no. Good.

Potential issue "He combined all 12 bitcoin in one wallet. No unit-specific identifiers distinguish premarital and marital bitcoin after commingling." Rule 3 says if indistinguishable separate and marital units commingled and later partially sold, withdrawals and remaining units retain same proportional separate and marital character as the mixed pool. We should cite in answer maybe "under Rule 3" not necessary but nice.

Potential issue "An exchange from one digital asset to another does not change character. The acquired asset takes proportional character of asset surrendered." We can mention "Rule 4."

Potential issue "Property found in undisclosed wallet during marriage is presumptively marital unless holder traces separate source." We can mention "Rule 7."

Potential "valuation date fixed" maybe "using the supplied prices." Good.

Let's perhaps include equations in final:

```
Marital fraction after commingling = 4/12 = 1/3
Separate fraction = 8/12 = 2/3

3 sold:
 S=3*(2/3)=2 BTC
 M=3*(1/3)=1 BTC

Remaining 9:
 S=9*(2/3)=6 BTC
 M=9*(1/3)=3 BTC

6 exchanged:
 S=6*(2/3)=4 BTC -> 60 ETH
 M=6*(1/3)=2 BTC -> 30 ETH

Remaining 3:
 S=3*(2/3)=2 BTC -> $100k
 M=3*(1/3)=1 BTC -> $50k

90 ETH:
 S=60 ETH -> $180k
 M=30 ETH -> $90k
```

Maybe include "30 ETH cold transfer remains included in the 90 ETH and does not change classification."

Potential "surcharge" equation:
```
20% × $120,000 = $24,000
```
Potential "overall" equation:
```
($140,000 + $120,000)/2 + $24,000 = $154,000
```
Or "Mira's known $70k + second wallet $60k + surcharge $24k = $154k."

Need maybe "If no second wallet, she should receive at least 70k, not 50k." Good.

Potential "settlement conditional" maybe "if Evan cannot disprove concealment, the court may order $154k. Therefore, an offer of $50k is too low by over $100k." Actually if second wallet not proven marital, known half is $70k. But since provisional marital, likely. Use "likely" if cautious: "Even on the undisputed known wallets, $50k is below the $70k floor. If the second wallet is marital and the surcharge is imposed, the recovery is $154k." Good.

Potential "Mira discovered second wallet through a tax information request" – Under Rule 7, "undisclosed wallet during marriage" presumptively marital; no need to identify external source exactly. Good.

Let's perhaps decide final answer oververbosity. Desired 5: moderate. But user asked multi-part; answer should be thorough. We can do around 1500-2000 words? Maybe 1200-1500. Need not too lengthy. But let's include all details.

Let's draft final:

---

"Under the supplied rules and prices, use proportional tracing."

Then sections.

Potential "The $50,000 settlement" at end: "Reject it. Do not settle conditionally before discovery; if Evan wants to settle, he must produce records and a number that reflects at least $70,000 + $60,000 + $24,000, plus any additional traced assets. But because the full extent is unknown, a targeted forensic order is required."

Need maybe "seek targeted forensic order" includes "before final division" not "assume source."

Potential "Mira's share if second wallet is marital and concealment intentional" maybe "Mira's total recovery from all crypto would be $154,000." But maybe if "Mira's share and possible concealment surcharge if second wallet is marital and concealment intentional" could be read as "Mira's share of second wallet = $60k; plus surcharge = $24k; total $84k." We'll include both.

Let's think if "surcharge" might be calculated on $120,000 or on "concealed marital property's value" which after ordinary division Mira would have received $60k; maybe 20% of $120k is $24k. yes.

Potential "Evan's proposal: wallet transfers too technical to trace" – "This is not an exception; the court can order a forensic blockchain examiner. The burden of proving gift remains on Evan." Good.

Potential "exact evidence still needed" maybe "not all missing records? Complete exchange records prove premarital ownership, but we still need to authenticate them." Maybe okay.

Potential "donor evidence" – "Although the brother is not a party, his records can be obtained by subpoena or court order." Good.

Potential "Mira's share of known marital crypto" if property division equal halves, but "each spouse ordinarily receives one-half of marital value after classification" means yes. We don't need discuss equitable factors.

Potential "If second wallet is marital and concealment intentional, the court may award surcharge equal to 20% of concealed property, in addition to ordinary division." Need maybe "the second wallet is not the only marital property; the surcharge is not 20% of all marital property." Good.

Let's perhaps include "No unit-specific identifiers means the 'first-in, first-out' or other methods are not used; proportional tracing controls." Good.

Potential "sale of 3 BTC proceeds went to joint account and spent" – If all spent, no "remaining proceeds" to divide. But if there is a remaining balance in joint account on valuation date, maybe unknown. Facts say spent. We can say "Assuming the sale proceeds were fully spent as stated, no remaining bank account asset exists." But maybe they might have been in joint account momentarily then spent. The valuation date "known traced holdings remain..." Not mention joint account balance. Fine.

Potential "The 30 ETH cold wallet" – "cold wallet transfer is not a taxable event? irrelevant; no character change." We'll mention.

Potential "40 ETH external address" – "tax records show arrival during marriage, but not source; need external address records and transaction hash." Good.

Potential "Evan omitted wallet from sworn disclosure" – "This may support an adverse inference and intentional concealment." Good.

Let's plan final response text:

```
Under these facts, the tracing is as follows.

**Commingled wallet**
1. At combination: ...
...
```

Let's ensure final answer doesn't sound like "I" maybe "I recommend." It's okay.

Potential "Mira's one-half share of known marital crypto" maybe "subject to an equalizing payment; she need not accept crypto in kind." Good.

Let's maybe final with a "Recommendation" heading:
"Request a targeted forensic order, not accept $50,000. The $50,000 is less than the $70,000 known floor. Also, if the second wallet is classified marital and concealment is found, the recovery would be $154,000. The unresolved donor/source facts should be resolved through discovery."

Potential "conditional settlement" maybe:
"Do not sign a conditional settlement that releases Evan. At most, accept a payment only as an advance/partial payment with all claims preserved, but the better first step is a court order compelling disclosure." Good.

Let's finalize. Ensure no mention "analysis" too repetitive.

Potential "governing law" "Rule 10" maybe "Rule 10 requires identify missing records before final settlement." We can mention.

Let's perhaps write final answer with markdown bullets and tables. Good.

Need keep final not too overly long but complete. Let's produce.