Short answer: this is usually legitimate. Licensed operators have anti-money-laundering obligations that require them to understand where a customer's money comes from once activity passes certain thresholds. It is intrusive, it is often badly handled, and it is also the law in the jurisdictions where it applies.
What triggers a casino source of funds check?
Source-of-funds checks are driven by volume and pattern rather than by withdrawal, which is why they can appear without warning on an account that has been running for months. Common triggers:
- Cumulative deposits passing a threshold over a rolling period
- A sudden change in deposit size relative to your history
- Deposits inconsistent with what the operator knows about you
- Certain payment methods, or funding from several different sources
- Periodic reviews of higher-value accounts
Note what is absent from that list: winning. A check triggered by deposit volume is routine. A check that appears for the first time immediately after a large win, on an account that never drew one before, is worth noting the date of.
What documents can show where my deposits came from?
| Source of income | Typical evidence |
|---|---|
| Employment | Recent payslips, or an employment contract |
| Self-employment | Tax return, or accounts |
| Savings | Bank statements showing accumulation |
| Property or asset sale | Completion statement or contract |
| Inheritance or gift | Solicitor's letter, or a signed statement from the giver |
| Gambling winnings elsewhere | Statements from the other operator |
The operator is trying to establish that the money plausibly came from where you say it did. A coherent explanation with one supporting document usually satisfies that; volume of paperwork does not substitute for coherence.
How do source of funds and source of wealth checks differ?
Two different questions, sometimes asked together, and worth separating because the answers differ.
Source of funds is about this money: where the specific amounts you deposited came from. A payslip and a bank statement usually answer it.
Source of wealth is about your overall financial position: how you came to have money at all. It is a broader question and normally arises only at higher volumes.
If you are asked for source of wealth when the deposits are modest, that is worth querying — ask what threshold triggered it. Legitimate compliance functions can answer that question.
How much financial information can a casino ask for?
Reasonable: payslips, tax documents, bank statements with unrelated transactions redacted, a written explanation. Being asked to explain a specific large credit into your account.
Not reasonable: your online banking login, read-only access to your accounts, an unredacted statement covering years, or documents about a third party's finances. If you cannot see why a document is needed, ask what it is being used to establish — a legitimate compliance team can answer that.
Redaction: you may generally cover transactions unrelated to the check. Keep your name, the account identifier and the dates visible, and keep visible whatever the credits in question are — those are the point.
What happens if I refuse a source of funds check?
Where an operator has a genuine regulatory obligation, it cannot waive it because a customer objects. The normal consequence of refusal is that the account is restricted or closed and the balance withheld pending the check — and a regulator asked to intervene will side with the operator, because the operator is doing what it is required to do.
If you are not willing to provide the information, the realistic options are to withdraw and close the account, or to accept that the balance stays frozen.
When might a source of funds check be used to delay payment?
The obligation is real; that does not mean every invocation of it is. Signs that it is being used to delay rather than to comply:
- It appears for the first time only after a large win, with no change in deposit behaviour
- Each document supplied produces a request for a different one
- The operator will not say what the request is intended to establish
- Demands escalate well past anything the deposit volume would justify
- Deposits continued to be accepted without question right up until you tried to withdraw
The handling of it is also a signal: a real compliance function tells you what it needs, in one list, and reviews promptly. A stall does not. Either way, the routes available are covered in the escalation path.
A sample note explaining where your deposits came from
Compliance teams read a lot of unexplained bank statements. A few lines that say what the documents show, in the order they show it, is the difference between a review that ends and one that produces another request.
“The deposits to my account between [date] and [date], totalling [amount], came from my [salary / savings / sale of …]. Attached: (1) my payslips for [months], showing net pay of [amount] a month into account ending [last four digits]; (2) statements for that account for the same months, with the deposits to you marked. If you can accept statements with unrelated transactions covered, please say so; otherwise tell me how you would like them submitted securely. Please confirm whether this completes the review, or list in one reply anything else you need.”
Pointing the reviewer to the relevant transactions in a covering note, rather than leaving them to find them, makes the evidence easier to follow. It does not guarantee a faster decision, but it removes one reason for another request.
How to prepare and send source of funds evidence
- Ask for the complete list and the deadline, in writing, before sending anything.
- Send a short written explanation alongside the documents. Context makes a thin evidence pack far more persuasive.
- Redact what is unrelated; keep the identifying details and the relevant credits.
- Send through the account upload rather than email where possible, so there is a timestamped record.
- Keep copies of everything and a log of dates.
- Ask what happens to the balance while the review runs, and get the answer in writing.
A question worth sitting with. Source-of-funds checks sometimes prompt an uncomfortable realisation — that the deposits add up to considerably more than you thought, or that you cannot easily explain where the money came from because it came from borrowing. If assembling this evidence is difficult for that reason, the check has told you something more important than whatever the operator concludes. Free confidential support is here.
Common questions
Why is the casino asking where my money comes from?
Licensed operators have anti-money-laundering obligations that apply once activity passes certain thresholds. It is triggered by deposit volume and pattern rather than by winning, which is why it can appear on an account that has been running for months.
Do I have to provide bank statements?
Usually yes if you want the account to continue operating, though you may generally redact transactions unrelated to the check. Keep your name, the account identifier, the dates and the relevant credits visible — those are the parts being verified.
What is the difference between source of funds and source of wealth?
Source of funds is about the specific money you deposited; a payslip and a statement usually answer it. Source of wealth is about your overall financial position and normally arises only at higher volumes. If you are asked for the second on modest deposits, ask what threshold triggered it.
Can I refuse?
You can, but where the obligation is genuine the operator cannot waive it. The usual consequence is the account being restricted and the balance withheld, and a regulator will side with the operator because it is doing what it is required to do.
