A message asking for bank statements can feel much more intrusive than an ordinary identity check. Before sending anything, establish who is asking, what they need and why. A legitimate financial review deserves a clear response, but an unexpected email should not persuade you to hand sensitive documents to an unverified contact.
This guide explains the practical differences between source of funds, source of wealth and identity verification. It includes an evidence-planning table, a worked example and a message you can adapt. It covers customers of online casinos licensed for Great Britain; it is not a promise that a particular document will secure approval.
Checked: 4 October 2026. Examples are illustrative. We have not submitted documents to an operator as part of this article, and acceptance requirements vary by case.
What does a casino source-of-funds check mean?
The question concerns the origin of money used in a transaction or relationship. Saying “it came from my bank account” describes the payment route but may not explain whether it was earned as salary, accumulated as savings or received from another documented source.
Source of wealth is broader: it concerns how someone's overall wealth was accumulated. These definitions are explained in HMRC's general anti-money-laundering guidance. That guidance helps explain the terminology; it is not a universal checklist for casino customers.
For example, a transfer from a savings account to a current account may explain the immediate route of a deposit. If the question is how those savings arose, the transfer alone leaves a gap. Start by identifying which question the operator actually asked, rather than sending every financial file you possess.
Why do casinos ask for financial information?
The Gambling Commission explains that operators may seek financial information to help prevent money laundering and understand risks of financial harm. Its consumer guidance on financial checks specifically discusses bank statements and income patterns.
A financial request does not automatically mean the customer has been accused of a crime. Equally, a request should not be treated as meaningless administration. Read it carefully and ask for clarification where the scope is unclear. Do not invent an explanation because a familiar option appears on a form.
There is no single customer-facing amount in this guide below which all checks can be avoided. Trying to divide payments or change accounts to escape a review does not answer the underlying question. The appropriate response is to deal with the actual request through the verified business.
Source of funds, KYC and affordability are different questions
| Term | Main question | Useful clarification |
|---|---|---|
| Identity verification or KYC | Who is the customer? | Which identity detail remains unverified? |
| Payment ownership | Does this payment method belong to the customer? | What ownership evidence is required? |
| Source of funds | Where did the particular money come from? | Which deposits or period does the request cover? |
| Source of wealth | How was the wider wealth accumulated? | Which sources need explanation? |
| Financial-harm assessment | Is there evidence of financial risk? | What assessment is being undertaken? |
One document may be relevant to more than one question, but that does not make the checks interchangeable. A passport can establish identity without explaining income. A salary entry can help explain a payment without showing that gambling is affordable after normal living costs.
Our casino identity-check guide covers basic verification separately. Keep the terminology used in the operator's message when replying, and ask it to explain any unfamiliar abbreviation.
What documents might help explain the money?
The following table is an evidence-planning aid, not an approved-document list. Ask the operator which files, dates and formats it accepts before collecting sensitive records. Different circumstances may need different evidence, and a document's existence does not guarantee it answers the request.
| Your explanation | Records to discuss with the operator | Potential gap to clarify |
|---|---|---|
| Employment income | Payslip and matching account credit | A different employer payment name |
| Accumulated savings | Statements showing accumulation and transfer | The original source of older savings |
| Self-employed earnings | Relevant accounts, invoices or tax records | Business receipts versus personal funds |
| Sale of an asset | Sale documentation and receipt of proceeds | The link between the sale and bank entry |
| Gift or inheritance | Documentation appropriate to that event | Which third-party details are necessary |
Keep the explanation short and chronological. If money moved between your own accounts, name the steps and match dates and amounts. If the evidence contains an apparent inconsistency, explain it honestly rather than altering a statement. Ask about an acceptable alternative if you cannot obtain the requested record.
A worked example: salary, savings and a deposit
Imagine a customer who receives wages into a current account, transfers part into savings over several months and later transfers £300 back. The casino asks about the source of a £100 deposit made that week. None of these figures is a regulatory threshold; they are simply a record-keeping example.
The current-account statement may show the £300 transfer and the £100 payment. It may not show how the savings were accumulated. A useful first response explains the sequence and asks whether evidence of the earlier salary credits is also needed. That is clearer than submitting a single screenshot of the savings balance.
The customer should not assume that the entire £300 is affordable gambling money. Source and affordability answer different questions. Showing where funds came from does not establish that risking them would leave enough for bills or other commitments.
How to submit evidence securely
Open the casino through a saved or independently checked address, sign in and look for the same request in the account. If the message only appears in email, contact official support to confirm it. Avoid using an unexpected attachment or shortened link as your only route to the upload page.
- Confirm the case reference and the team handling the review.
- Ask for the required date range, document type and supported file format.
- Check which details must remain visible and whether any redaction is permitted.
- Use the verified upload process and retain its confirmation.
- Record the submission date and the next expected update.
Never send bank-login passwords, card PINs or one-time security codes as supporting evidence. If a third-party financial service is involved, establish its identity and what permission you are granting before proceeding. Do not give a support agent control of your computer so they can “complete the check”.
Can you redact a bank statement?
Ask first. Removing information without agreement may leave the review unable to establish ownership or follow a transaction. On the other hand, you should not assume every unrelated detail is needed. Ask which fields and transactions are necessary and whether the operator accepts a limited date range.
Keep an untouched original privately. If redaction is expressly accepted, make a separate copy using a proper redaction tool rather than placing a removable shape over text. Do not obscure relevant figures, change entries or present an edited document as an unaltered original.
For broader questions, read the operator's privacy notice and ask who receives the information, why it is retained and how to contact its privacy team. Our casino data privacy guide explains the questions worth recording. Account closure and immediate deletion of all records are not necessarily the same process.
What if the request arrives when you withdraw?
The Commission's verification guidance says operators should not wait until withdrawal to demand age or identity evidence they could reasonably have requested earlier. Additional checks may nevertheless become necessary in circumstances that were not identifiable before.
Ask what is outstanding, why it is required now and whether the withdrawal remains active. Keep the payment reference separate from the document-review reference. Avoid repeatedly cancelling or recreating requests; instead, ask the operator to describe the current state of the original transaction.
If a document is rejected, request the specific reason. “Please resubmit” does not tell you whether the problem is an unreadable file, the wrong dates or a missing link in the explanation. Respond to that identified gap rather than uploading the same material repeatedly.
A clear message to send support
I received your request for source-of-funds information under reference [reference]. Please confirm which transactions or date range it covers, the documents and formats you accept, and the secure submission route.
My explanation is [brief factual explanation]. Please clarify whether the records I propose to provide will address the request, what information must remain visible, and whether any unrelated details may be redacted. Please also confirm any account restrictions and when I should expect the next update.
Replace every bracket before sending. Keep a copy of the message and reply in the same case where possible. A concise, accurate record makes it easier to spot which question remains unanswered.
Frequently asked questions
Does a check mean I have done something wrong?
Not necessarily. Ask for the purpose and scope without assuming either wrongdoing or automatic approval. Provide an accurate explanation and retain the operator's response.
Can I refuse to provide documents?
You can ask questions or decline to share information, but that may prevent completion of the review. Ask what this means for the account and any outstanding balance; do not assume declining removes the operator's obligations.
How long will a source-of-funds review take?
This guide cannot guarantee a timeframe. Ask for the next update date and whether anything remains outstanding. If the issue becomes an unresolved dispute, use the operator's formal complaints procedure rather than relying solely on repeated live chats.
Editorial note: Regulatory sources are linked where used. Evidence tables and examples are practical suggestions, not a universal legal document list or individual legal advice. 18+ only. Gambling can cause harm; support is available through GamCare and our support resources.