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To document the source of cryptocurrency funds, show a reviewer how the specific assets under review were acquired and how they moved to the account or wallet in question. Build a dated chronology, connect each step to a reliable record, and explain any gaps, fees, conversions, or transfers. There is no universal evidence package: follow the bank’s or platform’s actual request and the rules that apply to your situation.
Clarify what the reviewer is asking you to prove
Start by checking whether the request concerns source of funds, source of wealth, or both. Source of funds explains where the particular money or crypto being reviewed came from and how you obtained it. Source of wealth explains how your overall assets arose—for example, through employment, inheritance, a property sale, or investment gains. The European Commission’s 2022 AML training manual describes this distinction; its examples are general AML guidance, not a crypto-specific evidence checklist. European Commission training manual.
The request’s scope matters. Ask the compliance team which account, assets or currencies, dates, transactions, and file formats it needs. A request for the origin of one incoming transfer may call for a narrower trail than a request about your overall wealth. Requirements depend on jurisdiction, your role, the circumstances, and the institution’s review; the cited authorities do not prescribe one submission package for every crypto holder.
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Build a traceable chronology for the funds
Organize the evidence around the particular funds, not just your general ownership of cryptocurrency. A short timeline should let a reviewer follow the path from acquisition to the wallet, exchange, or bank account under review. Use dates, amounts, asset names, and transaction references where available, and reconcile the entries with statements or transaction histories.
| Date | Asset and amount | From | To | Transaction reference | Supporting record |
|---|---|---|---|---|---|
| When the event occurred | For example, the quantity of the crypto involved | Bank, exchange, wallet, payer, or other source | Receiving exchange, wallet, or bank account | Use the reference if available | Name the statement, receipt, or other record |
Include every material leg in the path. For example, an exchange withdrawal followed by a transfer between two self-hosted wallets may need both sides of the transfer explained. If the amount changes between entries, account for trading, fees, conversions, or partial transfers rather than leaving the reviewer to infer what happened.
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A blockchain transaction reference can help identify an on-chain movement, but it does not necessarily establish who controlled the sending address or how that person acquired the assets. Pair it with records that connect the movement to you and to the acquisition route when those records exist. The cited authorities do not prescribe a specific blockchain export format for individual customers.
Match records to how you acquired the crypto
Use records that substantiate the steps in your actual acquisition route. No single item is guaranteed to satisfy a particular reviewer, and the cited authorities do not establish a complete crypto-specific checklist.
- Exchange purchase: Include relevant exchange account statements or transaction history showing fiat deposits, trades, and withdrawals. Add bank statements for the fiat deposits or withdrawals when they help connect the exchange activity to your bank account.
- Payment for work or services: Use the relevant invoice, contract, payroll record, or payment statement, along with transaction details showing receipt of the crypto.
- Mining or staking: Provide applicable platform or pool statements and records showing the related proceeds, if available.
- Gift or inheritance: Use documents that record the transfer or inheritance, together with transaction details linking the assets to the wallet or account under review.
- Sale of an asset: Include sale documents and the records showing how the proceeds were converted to or used to acquire the crypto.
These are practical examples, not a regulator-mandated list. Choose records that cover the relevant dates and connect one step to the next; a record that merely shows a balance may not explain how the assets were obtained.
Assemble a clear, limited submission
- Read the request closely. Note the requested account, period, assets or currencies, transactions, and file formats. If any part is unclear, ask the reviewer before gathering unrelated personal records.
- Write a brief cover note. Identify the account under review, the relevant period, and the acquisition route. State what the attached chronology and records show.
- Prepare the dated timeline. List the relevant acquisition and transfer events, with amounts, source and destination, and transaction references when available.
- Attach the records for each step. Use statements, receipts, contracts, or other records that support the timeline. Label the files so a reviewer can match them to its entries.
- Explain exceptions. Briefly account for missing records, fees, conversions, partial transfers, or other differences between the timeline and statements. Do not present an unexplained gap as if the records reconciled.
- Submit through the institution’s verified process. Use its secure channel and confirm unusual requests through a known official contact method.
Share only information relevant to the stated scope. A compliance review should not require you to disclose a seed phrase or private key; never provide either as proof of funds.
What the rules do—and do not—say about your records
FinCEN’s recordkeeping guidance is often easy to misread as a personal document-retention rule. Its 2007 guidance says covered financial institutions must keep a copy of a suspicious activity report (SAR) and original or business-record-equivalent supporting documentation for five years from filing, and provide the documentation upon request by specified authorities. This is an obligation concerning covered institutions’ SAR documentation, not an automatic five-year retention requirement for every customer’s personal crypto records. FinCEN, Suspicious Activity Report Supporting Documentation.
Similarly, FinCEN’s BSA FAQ statement that a reviewer should document the scope, procedures, testing, findings, and recommendations concerns an MSB’s internal BSA review. It is not a checklist for an individual customer’s submission. FinCEN, Answers to Frequently Asked BSA Questions, Question 18(d).
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U.S. regulatory classification is a separate issue from a bank’s request for evidence. FinCEN’s 18 March 2013 guidance distinguished users of convertible virtual currency from administrators and exchangers; it stated that a user who obtains virtual currency and uses it to buy goods or services is not a money services business under the cited U.S. regulations for that activity alone, while administrators and exchangers may be money transmitters unless an exception or limitation applies. This dated guidance does not mean every crypto user is a regulated MSB, nor does it determine whether a bank can ask an individual for source-of-funds evidence. FinCEN, Application of FinCEN’s Regulations to Persons Administering, Exchanging, or Using Virtual Currencies.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Check whether a reviewer can follow the evidence
Before submitting, look at the packet from the reviewer’s perspective. Each material acquisition or movement should be supported by a record, and amounts and dates should reconcile as far as the available evidence allows. This is a practical organization test, not an official regulator scoring rubric.
- Does the evidence connect the acquisition source to the specific funds under review?
- Can the dates, amounts, and transfers be reconciled across the records?
- Are the records original statements or reliable business-record equivalents where available?
- Do they cover the requested period and scope?
- Can someone follow the trail without guessing who sent or received funds, or why an amount changed?
FinCEN’s 2024 TD Bank consent order illustrates why an institution may focus on the origin and purpose of crypto-related funds: it described a customer group that received more than $650 million from an international cryptocurrency exchange while the bank did not know the purpose, ultimate originators, or source of funds. That figure describes a specific enforcement case, not the prevalence or outcome of crypto source-of-funds reviews generally. FinCEN, TD Bank Consent Order No. 2024-02, 10 October 2024.
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