Exchange Asking for Source of Funds Proof: What Documents to Send?

12 October 2026

If an exchange asks for proof of funds, it means its compliance team has flagged your account for a standard anti-money laundering (AML) review. The correct response is to provide clear, verifiable documents that trace where your cryptocurrency or fiat money originally came from. Do not ignore the request, and do not send random screenshots. Send what they ask for, in the format they specify, and be prepared to explain your transaction history.

Why exchanges ask for this

Exchanges operate under financial regulations that require them to verify the source of assets moving through their platforms. When you deposit a large amount, receive a substantial transfer, or show a pattern of activity that looks unusual, their automated systems may trigger a manual review. This is not an accusation of wrongdoing. It is a legal obligation on their part.

The request usually arrives via email or as an in-app notification. The message will typically state a deadline, often 14 to 30 days, before which you must respond. If you miss that deadline, the exchange may freeze your funds or close your account. Act promptly, but do not rush into sending the wrong documents.

What they actually want to see

The goal is to show a paper trail from the moment you acquired the funds to the moment they landed on the exchange. You need to prove that the money or crypto is yours and that it came from a legitimate source.

For fiat currency, that means bank statements. For cryptocurrency, that means transaction records from a blockchain explorer or a wallet export. The key is that the documents must show your name, the amounts involved, and a date range that covers the deposits in question.

Documents that usually work

The following list covers the most commonly accepted forms of proof. You may not need all of them, but you should provide as many as you can reasonably gather.

1. Bank statements showing the original deposit into your account that you later used to buy crypto. Redact nothing that matters: your name, the bank's name, the transaction amounts, and the dates must all be visible. PDFs downloaded directly from your online banking portal are best. Screenshots of a phone banking app are often rejected as they can be edited too easily.

2. A letter from your bank confirming your account activity. Some banks will provide this for a small fee. It is a more official document than a statement and can carry more weight.

3. Exchange transaction history from the platform where you originally bought the crypto. If you bought Bitcoin on one exchange and transferred it to the one now asking questions, log into the first exchange and export the trade history and withdrawal records. This shows the link between your fiat purchase and the crypto you later sent.

4. Blockchain explorer links for the specific transactions in question. If you received a large deposit of crypto directly to your address, find that transaction on a service like Etherscan or Blockchain.com. Copy the public transaction ID (the long hash) and explain in your message: "This is the transaction where I received X amount from my external wallet." They can verify it themselves.

5. A written explanation of what you did. This is not a document, but it matters. Write a short paragraph that explains the chain: "The customer bought 2 BTC on Exchange A in March 2024 using a linked bank account. The customer withdrew it to a personal wallet on April 5, 2024, and then sent it to your platform on October 1, 2024, to sell." This narrative ties the documents together.

What not to send

Do not send screenshots of a wallet app on your phone. Do not send a redacted PDF with your name blacked out. Do not send a statement that only shows a balance and no transactions. Each of these fails to prove provenance and will likely trigger a follow-up request, which wastes time.

Do not try to hide the origin of the funds. If you borrowed money from a friend or family member, you need a signed loan agreement or a gift letter. If you earned the money from a salary, send the payslips alongside the bank statement showing the deposits. If you sold a car or property, send the sales contract. The point is that the documentation must match the story you tell.

How to Submit the Documents

Most exchanges have a designated upload portal in their compliance section. Do not email documents unless the request explicitly tells you to. If you must email, send it from the email address registered to your account, and include your account ID in the subject line.

Before uploading, check the file format. Some exchanges accept PDFs only, others allow images. Compress large files if needed. Name the files clearly, such as BankStatement_Jan2025.pdf rather than scan001.pdf.

What happens after you submit

The review process takes time. It is not unusual for it to take a week, and it can take longer if the case is complex. You will likely receive an automated acknowledgement immediately. After that, a human will look at your documents. If they need more information, they will reply to the request thread. Check that thread, and your spam folder, regularly.

If the exchange rejects your documents, they will usually tell you why. Common reasons include unreadable scans, missing pages, or a mismatch between the name on the account and the name on the document. Correct the issue and resubmit.

If you cannot provide the proof

This is the harder situation. If you cannot produce a bank statement or a transaction record, you have a problem. This happens when funds were obtained through cash trades, peer-to-peer transfers with strangers, or mining. In these cases, provide what you have. A collection of smaller documents, such as a receipt from a local Bitcoin ATM or a record of a peer-to-peer trade, is better than nothing.

Be honest about the gap. A short explanation that you do not have a traditional bank statement because you used a cash exchange, but here is the receipt from that machine, is more useful than a blank refusal. The exchange may still reject it, but you have given them something.

How long this takes

The deadline for you to respond is fixed, but the exchange's review time is not. Some platforms complete the review in three days, others take three weeks. You cannot speed this up by contacting support repeatedly. Sending multiple follow-up tickets will only delay the process by creating noise. One polite follow-up after ten days is acceptable. More than that is counterproductive.

The best outcome is that the exchange accepts your documents and lifts the hold. The worst outcome is that they close your account and return your funds to the original source, minus any fees. In either case, the path forward is the same: provide clear, verifiable proof of where your money came from. Do that, and you have done everything you can.

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