How to Prove Source of Funds for Crypto

What the Exchange Is Trying to Establish

Source of Funds, or SoF, concerns the origin of the assets involved in a particular payment, deposit or balance. It may be requested when you make a large deposit, change your usual pattern, transfer from an outside wallet or undergo a periodic account review. A request is not, by itself, an accusation of wrongdoing.

The provider may ask separate questions. Do not answer one and assume it answers them all.

Kraken’s explanation of Source of Funds describes the same distinction in practical terms: evidence of how money was obtained, evidence it was received and, if it has already reached the account, evidence of the transfer in. The provider’s own request remains the controlling checklist for your case.

If you are unsure whether the exchange means the origin of a specific transaction or your broader financial history, compare Source of Funds with Source of Wealth before uploading documents.

Build One Traceable Chain

Choose one deposit or group of related deposits and work backwards. Give each record a number so the reviewer can follow the movement without reconstructing it from screenshots.

1. Identify the reviewed deposit: asset, amount, network, date, account reference and any transaction hash.
2. Identify the sending wallet or exchange and obtain its withdrawal or transfer record.
3. If the crypto was bought elsewhere, export the purchase and trade record showing the account holder, fiat amount and acquired asset.
4. Match the purchase to the bank or card payment that funded it.
5. Add the record explaining the underlying source: salary, business proceeds, sale proceeds, savings, gift, inheritance or another genuine source.
6. Note conversions, fees, partial transfers and time gaps in a short chronology.

For example, a salary-funded BTC deposit may be documented by payslip → salary credit in a named bank account → transfer to Exchange A → BTC purchase → withdrawal to your wallet → on-chain transfer → deposit at Exchange B. Do not claim that two amounts should match exactly if trading, market movement or fees explain a difference. State the actual figures and dates.

The transaction hash proves a transfer on the relevant network, but it does not prove where the original money came from. A bank statement can prove a payment from your account, but not always the asset purchased with it. The value lies in matching the records.

Which Evidence Fits Your Source

Coinbase’s document guidance gives examples of bank, exchange, wallet, mining, employment and sale records. Its listed formats and age requirements are platform specific; do not assume another exchange will accept the same combination. A fuller document comparison is available in Crypto Proof of Funds: Documents Exchanges May Request.

Handle Difficult Transaction Histories Honestly

Old Purchases and Missing Exchange Records

Request account statements from the original provider and search bank archives for matching payments. An old confirmation email may help identify the date and reference, but it is weaker than an account export. If the exchange has closed, explain that gap and provide available bank records, tax reports, wallet history and contemporaneous correspondence. Do not manufacture an account statement or describe a reconstructed spreadsheet as an original record.

Self-Hosted Wallets, Swaps and Bridges

Record each wallet address, network, token and transaction hash. Explain whether you controlled each wallet and how that can be demonstrated through a platform-linked withdrawal or another legitimate verification method. A bridge transaction and receipt on a second network should be paired; the same value may appear in a different token. Do not share a seed phrase or private key to prove ownership.

Third-Party and P2P Payments

Show who paid whom and why. If a relative funded a purchase or a P2P counterparty paid through a different name, do not conceal the discrepancy. Provide the order, payment, delivery and any agreement, then explain the relationship. The reviewer may need more information or may refuse a transaction it cannot reconcile with its policy.

Corporate Funds Used by an Individual

A business bank statement does not automatically explain a personal investment. Add the company ownership or authority, the underlying business revenue, and the lawful dividend, salary, loan or other transfer to the individual where applicable. Keep the company and personal accounts distinct in the chronology.

Submit a Focused Explanation

Reply in the existing secure compliance ticket. Quote its reference and the particular deposit or period. A compact cover note could say:

“The [amount and asset] deposited on [date] came from [source]. Files 1–2 show receipt of the original funds; files 3–5 show their purchase and transfer through [services/wallets]; file 6 matches the deposit. The [difference] reflects fees and a partial conversion. Please confirm whether this addresses the requested Source of Funds evidence or identify the missing link.”

Attach readable originals or provider-generated PDFs/CSVs, plus a one-page index. Check that names, dates, currencies and account identifiers are visible. Ask the provider before redacting a field that it expressly needs; retain an unmodified original. Use its genuine app or secure upload portal, never an address supplied by an unsolicited “agent.”

The EBA’s guidance on ML/TF risk factors for crypto-asset service providers explains the risk-based context of these checks. It does not prescribe one universal set of documents for every customer. A crypto AML review may lead to further questions after the first submission.

Get a Free Source of Funds Assessment

What Happens After Submission

The provider may accept the explanation, request a missing statement, ask about a specific wallet or third party, retain restrictions while reviewing, or decide it cannot continue the relationship. Save the upload confirmation and every response. If the request changes, answer the new question with an updated index rather than repeatedly sending the entire archive.

If an in-scope EU crypto-asset service provider does not address a coherent request or you dispute its decision, consider its formal complaints procedure. MiCA Article 71 requires complaint procedures for providers within its scope; it does not guarantee that documents will be accepted or that withdrawals will resume. Legal help is proportionate when documents conflict, assets are substantial, several entities are involved or a formal escalation is needed.

Mistakes That Slow a Source of Funds Review

• Sending only a payslip for a crypto deposit. Add the bank, purchase and transfer records that connect it to the deposit.
• Uploading a blockchain explorer screenshot without the network and full hash. Include the underlying transfer details and the account export.
• Treating a tax return as a transaction receipt. It may explain income over a period but rarely proves a particular wallet transfer.
• Hiding a third-party payment or changing the story between tickets. State the discrepancy and support it with records.
• Sending unrelated years of statements. Identify the relevant transactions and ask if a wider period is required.
• Sharing credentials or an entire wallet with someone offering to “certify” funds. Use ordinary records and verified platform channels.

Get a Case Assessment

If a substantial balance remains restricted or the acquisition history spans several services, Get a Free Case Assessment from P&P Crypto Asset Recovery. Send the provider’s request, a one-page timeline and the core records through a verified channel. We can identify the missing link and an appropriate next submission; no outcome is guaranteed.