Source of funds checks explained

A source-of-funds check asks you to show where the money you're gambling with actually came from — a payslip, bank statement, savings statement or similar — rather than just verifying who you are. It's a distinct step from standard identity KYC, and UK-licensed operators are required to carry it out when certain spending patterns or risk signals are present.

Key facts

• Source-of-funds requests are usually triggered by activity — sustained high spending, a sudden increase in deposits, or specific risk indicators — rather than applied to every player from account opening.
• Acceptable evidence commonly includes recent payslips, bank statements, savings/investment statements, or documentation of another legitimate source (inheritance, sale of an asset, and similar), depending on what the operator asks for.
• This is different from a source-of-wealth check, which some operators may ask for in higher-risk cases — that looks at the broader picture of how your overall wealth was accumulated, not just the funds in a specific account.
• Source-of-funds checks sit within UK operators' wider anti-money-laundering and social-responsibility obligations under their Gambling Commission licence conditions, not a punitive measure aimed at any individual player.

Why this exists

Licensed operators are required to have controls that reduce the risk of gambling being used to launder money, and to identify players who may be spending beyond means that can reasonably be evidenced. Asking where gambling funds come from is one of the more direct ways of doing both.

What can slow the process down

• Documents that don't clearly show your name, or don't match the account details on file.
• Cash-heavy income that's harder to evidence with standard paperwork.
• Large or fast changes in spending pattern, which can prompt a fresh request even if you've verified before.

Common misconceptions

• "Only 'high rollers' get asked for this." Thresholds and triggers vary by operator and by account activity — it isn't reserved for one type of player.
• "It's the same as ordinary identity verification." Identity KYC confirms who you are; source-of-funds confirms where the specific money came from — see our casino KYC guide for the identity side.
• "A request for source-of-funds means my account is being closed." It's a standard compliance step, not, by itself, an indication of a decision about your account.

Related content

See casino KYC and verification explained and UK gambling licensing explained.