Behind the question "How to answer source of funds?" there is usually a payment that stopped somewhere. It rarely says why: the screen shows a generic error, the money stays where it was or sits in a pending state, and the player is left guessing whether the problem lies with the bank, the payment provider or the casino. Most blocks fall into a handful of known causes, and each one leaves a different trace in the transaction history.
Payment providers go down more often than casinos admit. When a processor has an outage, deposits fail across many sites at once, and withdrawals queue until the service returns. Casinos usually post a notice on the payment page or in the live chat, and the provider's own status page confirms it. Waiting a few hours is normally enough, and switching to another method during an outage can leave two payments to sort out afterwards.
A casino can place a hold on the account itself. Missing documents, a name that does not match the payment method, or a change of address during play can all pause withdrawals until the details line up. Larger wins or unusual deposit patterns can lead to a source of funds review, which asks for payslips or bank statements. The message about a hold normally names the missing item, and sending exactly that item ends the review sooner.
Limits reached on the account block payments without any fault on either side. A deposit limit set by the player stops new deposits until the period resets, and a cooling off or self exclusion period stops them entirely. Some casinos also cap deposits for new accounts until verification is complete. The limits page shows every active limit and the date it lifts, which answers the question before any support ticket has to be opened.
The transaction history marks withdrawals sent back to the balance with a short code, and support can translate that code into the reason.
Casinos often post a notice on the payment page or in live chat, and the provider's own status page confirms an outage.
The bank's app usually records the refusal even when the casino shows only a generic error, and calling with the time and amount clears most cases.
Issuers can block gambling payments entirely, above a daily amount, or flag a first payment to an unfamiliar merchant as possible fraud.
Yes; missing documents or a source of funds review can hold payouts, and sending exactly the item named in the message ends the review sooner.