Source Of Funds

Source of funds (SoF) is documentary proof of where the specific money a player deposits or gambles with actually came from, which licensed casinos and bookmakers must request under anti-money-laundering rules before releasing large payouts or accepting heavy deposits. It answers the narrow question "where did this cash originate?" — a recent salary payment, a property sale, an inheritance, investment proceeds or another traceable source — and is distinct from source of wealth, which covers a person's overall net worth. Accepted evidence typically includes payslips, bank statements showing the money arriving, a tax return, a dividend or pension statement, or a signed contract for a sale. The operator matches the amounts and dates in those documents against the funds moving through the account, so partial or edited files are usually rejected. Worked example: you deposit £8,000 across a month and request a £6,500 withdrawal. The cashier freezes the payout and asks for source of funds. You upload three months of bank statements plus two payslips totalling £9,200 net, and the compliance team confirms the deposits are consistent with your salary. The withdrawal is released, often within one to three working days once the review passes. Practical context: SoF requests are a legal obligation under regimes such as the UKGC and MGA, not an accusation, and are triggered by cumulative spend, not just a single big win. Prepare clean, unedited documents in your account name to avoid delays, and never gamble money you cannot fully account for. See also source of wealth, KYC, AML and affordability checks.