Explain it the plain way: where each transfer came from, what it was for, and the records that prove both. That's the only explanation that holds up when a bank or a mortgage lender asks about crypto on your statement, because their questions come straight out of anti-money-laundering rules that make them understand the purpose of your transactions and, where necessary, the source of the money. None of the rules we checked says crypto activity alone gets a loan refused. Money nobody can account for is what causes the trouble.
This page covers the stretch before anything has gone wrong. Your account still works, but someone from the bank has asked what those transfers are — or you're about to apply for a mortgage, and the last few months of statements are full of names you don't recognise. If the card is already frozen, or you suspect a payment you received is dirty, there are separate pages for that.
Rules quoted below were checked on 2026-11-05. The UK rule comes from legislation.gov.uk. Mainland China's rules are labelled as such every time, since plenty of readers here bank there and the two systems aren't interchangeable. Nothing here is legal advice, and FiatPath can't see any bank's risk model.
What a crypto transfer looks like on a statement
A statement line is a date, an amount, a counterparty name or account number, and a reference. Sell crypto peer-to-peer and the money arrives from the buyer's personal account; the reference usually says nothing about crypto at all.
So banks read the pattern. Under the UK Money Laundering Regulations 2017, regulation 28(11)(a), ongoing monitoring includes "scrutiny of transactions undertaken throughout the course of the relationship (including, where necessary, the source of funds) to ensure that the transactions are consistent with the relevant person's knowledge of the customer, the customer's business and risk profile." The question underneath is whether the account still looks like the person who opened it. Dozens of unrelated people paying you in, money leaving soon after it lands, monthly volume far above what your declared job would explain. That list is our reading of what an inconsistent account tends to look like; banks don't publish theirs.
Why the bank is asking you
Regulation 28(2)(c) requires a bank to "assess, and where appropriate obtain information on, the purpose and intended nature of the business relationship or occasional transaction." A call asking what the transfers are for is that duty being carried out. It's a question, and it runs separately from anything the bank may report.
Mainland China draws that line more bluntly. Its Anti-Money Laundering Law, in force since 1 January 2025, has banks report large and suspicious transactions to a monitoring centre (Article 35) and says the filing of a suspicious-transaction report is to be kept confidential. Articles 29 and 30 are the other half: the bank verifies the purpose of your transactions and, where the risk is higher, the source and use of the funds. You won't hear about a report; the verification is the part that reaches you, usually as a call.
China's 2021 notice on virtual currency trading (Yinfa [2021] No. 237) adds four things a mainland account holder should know: it classes virtual currency business activity as illegal financial activity, it tells banks to step up monitoring of crypto-related payments, it bars them from providing accounts and transfers for that activity, and it warns that where investing in virtual currency goes against public order and good morals, the civil acts involved are void and any resulting loss is the investor's own to bear. A mainland bank refusing a crypto-linked transfer is acting on written policy.
Answering: the true version, with your own records
Say what it was. If those payments are buyers paying for crypto you sold, that is the answer. Honesty can cost something — a mainland bank may limit the account's transaction types, amounts or frequency under Article 30 — but a made-up story costs more, because every later transfer has to fit it. The slip people make most is the first thing they say on the phone. "A friend paying me back" sounds harmless right up until it has to explain forty payments.
China's law states the duty outright: provide information about your transactions and funds truthfully (Article 38). Refuse reasonable due diligence and the bank may restrict or refuse service, end the relationship, and file a suspicious-transaction report.
You won't need anyone to vouch for you; the records are your own:
- Exchange trade history or P2P order records, so each incoming payment matches an order;
- Where the crypto came from — deposits or purchases showing it was yours to sell;
- Your bank's own transaction export;
- A short timeline you write yourself, tying those three together by date.
Which records to download and where they live is laid out in Suspicious P2P payment: stop, save proof, then appeal.
Applying for a mortgage or a loan
This page doesn't cover UK or US mortgage affordability rules, so there's no regulation quoted here. What brokers and borrowers describe in public blogs and forum threads is fairly consistent: lenders read your recent statements, ask about large or unexplained transfers in either direction, and want a paper trail for the deposit money. How they treat crypto varies from lender to lender — that part comes from people in the market, not from any rule we found.
Mainland China's version is on paper. The Measures for the Administration of Personal Loans (NFRA Order No. 3 of 2024, in force since 1 July 2024) have the lender investigate the applicant's income and repayment source (Article 15), check that the information is true (Articles 14 and 18), and hold the borrower liable for failing to provide true and complete information (Article 42). Nothing in it says a crypto history means refusal. Our own judgement: irregular proceeds from selling coins are unlikely to be counted as steady income, so build the application on income you can document and keep the crypto money out of that figure. If the lender asks about other credits on your statements, explain them truthfully, as in the section above.
If the bank restricts the account anyway
For accounts in mainland China, Article 39 of the AML Law sets the order. Raise the objection with the bank first; it must handle it and reply within fifteen days, sooner where basic, essential financial services are involved. No reply in time, or unhappy with the result? Complain to the anti-money-laundering authority — or go straight to court. Article 30 adds that a bank's measures must not be clearly out of proportion to the risk. Send the objection in writing and keep a note of the date. Article 39 doesn't spell out when the fifteen days start counting, so a dated record of when you raised it is the safest reference.
We haven't verified an equivalent procedure for UK or other accounts. Ask the bank in writing what it needs and how its complaints process works, and keep copies of everything you send.
Stop if any of these is happening
- Someone suggests breaking payments into smaller ones. China's AML Law (Article 54, item 7) lists a financial institution using split transactions, or helping a customer do so, to deliberately evade anti-money-laundering duties as a violation; and under the central bank's 2016 reporting measures (Article 11), suspicious-transaction reports are filed whatever the amount. Smaller, more frequent transfers also look more like the pattern that got you noticed.
- You're about to give the bank a purpose that isn't true. Go back to the record list.
- Someone offers, for a fee, to tidy up your statements or write the explanation for you. The records the bank wants can only come from you.
- The account is already frozen. See Frozen bank card after cashing out.
- You think the incoming money itself is suspect. Start with the suspicious-payment page above, then whether money already in your account can still be frozen or clawed back.
Sources checked 2026-11-05: the purpose-and-nature and ongoing-scrutiny duties are regulation 28(2)(c) and 28(11)(a) of the UK Money Laundering Regulations 2017. Mainland China: due diligence, restriction measures and their proportionality limit, reporting and confidentiality, the duty to provide information truthfully, the fifteen-day objection route and split transactions are Articles 29, 30, 35, 38, 39 and 54 of the Anti-Money Laundering Law (Chinese text, revised November 2024, in force 1 January 2025); suspicious-transaction reporting regardless of amount is Article 11 of the Measures for the Administration of Large-Value and Suspicious Transaction Reports by Financial Institutions (PBoC Order [2016] No. 3, Chinese, 2016 text; later amendments not checked); the classification of virtual currency activity, the void-acts and own-loss warning and the monitoring instruction are in Yinfa [2021] No. 237 (Chinese); loan investigation and borrower liability are Articles 14, 15, 18 and 42 of the Measures for the Administration of Personal Loans (Chinese). English renderings of Chinese provisions are our own paraphrase. FCA mortgage affordability rules were not checked for this page, and the lender behaviour described above comes from broker and borrower accounts rather than regulation. We did not contact any bank, go through a bank review or apply for a loan in writing this page. Not legal advice.