Casino asking for bank statements? Source-of-funds checks explained

What a source-of-funds check actually is

Under UK anti-money-laundering rules, casinos must satisfy themselves that the money you gamble with comes from legitimate income. When your deposits or activity cross certain thresholds, the operator has to ask for evidence — commonly payslips, bank statements, tax returns, or proof of savings, inheritance or asset sales.

This is separate from identity verification (KYC). You can be fully ID-verified and still get a source-of-funds request later, because the two checks answer different questions: who you are, versus where the money comes from.

When it triggers

There's no single published threshold, but in practice checks commonly bite around the £2,000 mark of deposits or withdrawals, and can trigger earlier if your deposit pattern changes sharply — a sudden jump in stake size is a classic prompt. Big wins frequently trigger a check at withdrawal time, which is why the request so often lands exactly when you're trying to cash out.

Each operator runs its own risk models, so the same player can sail through one casino and get checked at another. That's not unfairness; it's different risk appetites.

What documents work (and what doesn't)

Clean, recent, and matching your account name: payslips covering three months, bank statements showing the income that funds your deposits, a tax return or accounts if you're self-employed, or documentation for windfalls (a completion statement for a house sale, a probate letter for inheritance).

What fails: cropped screenshots, statements with the name cut off, documents in someone else's name, and explanations without paper. If the money genuinely came from someone else — a partner's account, say — expect friction; gambling with third-party funds is exactly what these rules target.

How it affects your withdrawal

A withdrawal caught behind a source-of-funds request sits frozen until the review finishes — and these are manual reviews, so days rather than hours is normal, and longer if you drip-feed documents. This is one of the biggest hidden drivers of the slow payout experiences in our data, and it's largely invisible in operators' stated times.

The only real defences: keep deposits within patterns you can document, respond to requests once with a complete pack rather than piecemeal, and if you play with meaningful sums, have the documents ready before you're asked.

If it goes wrong

Operators can't legally return funds until checks complete, but they also can't sit on them indefinitely. If a review drags past a couple of weeks despite complete documents, complain formally in writing, then escalate to the operator's ADR provider — it's free for UK players. Unresolved payment complaints are exactly what our reliability index counts, so the operators that handle this badly show up in the scores.