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Casino Source of Funds Letter Template – What to Send and Why They Ask
You requested a withdrawal, and the casino sends you an email: "Please provide proof of your source of funds." It can feel invasive. Why does a casino need to see your bank statement? And what exactly should you write in a source of funds letter?
We get asked about it constantly. The short answer – it is a legal requirement, not a stalling tactic. Every licensed casino operating in regulated markets must verify where your money comes from. Here is everything you need to handle the process quickly and confidently – including a letter template you can adapt.
What Is a Source of Funds Check?
A Source of Funds (SOF) check verifies that the money you deposit and gamble with comes from a legitimate origin. It is separate from standard identity verification (KYC), which confirms who you are.
Think of it this way:
- KYC = Are you who you say you are? Our KYC explainer covers the identity verification side in detail.
- SOF = Can you show where this money came from?
The casino needs to confirm your gambling funds are not linked to criminal activity, fraud, or money laundering. It also helps them assess affordability – making sure you are not betting beyond your means.
Key Takeaway
A source of funds request is routine compliance, not a sign that you are under suspicion. Thousands of players complete these checks every day.
Why Casinos Ask for This
Anti-Money Laundering (AML) regulations require licensed operators to know where player funds originate. In the UK, the Gambling Commission mandates these checks. The Malta Gaming Authority, Curaçao Gaming Authority, and other regulators have similar rules.
Casinos do not enjoy asking for your documents. The process costs them time and money too. But operators are legally required to conduct these checks under their licence conditions, and regulators audit compliance regularly.
Common triggers for a SOF request include:
- Depositing above a certain threshold (often £2,000–£5,000 cumulative)
- Requesting a large withdrawal
- A sudden increase in deposit frequency or size
- Account flagged during routine compliance reviews
The check protects everyone. It keeps criminal money out of the gambling system and helps operators meet their legal obligations.
What Documents You'll Need to Send
Casinos typically accept several types of evidence. You do not usually need all of them – two or three documents often suffice.
Bank statements – The most commonly requested item. Provide statements covering the last 3 months that show your name, account details, and regular income deposits. PDF downloads from your banking app work fine.
Payslips – Recent payslips (last 1–3 months) confirm employment income. They should show your name, employer, and net pay matching your bank statement deposits.
Tax returns or P60 – Useful for showing annual income. Particularly helpful if you are self-employed or have multiple income streams.
Savings account statements – If your gambling funds come from savings, a statement showing the balance and your name is enough.
Investment portfolio or dividend statements – Relevant if you fund your account from investment returns.
Property sale or inheritance documents – For lump-sum wealth, a solicitor's completion statement or probate document works.
Make sure every document clearly shows your full name and is dated within a reasonable window. Blurry screenshots or cropped images get rejected – PDF downloads from your bank or employer portal are the safest format.
How to Write a Casino Source of Funds Letter
Some casinos ask for a written declaration alongside your documents. Keep it simple and factual. Here is a template you can adapt:
Keep the letter under one page. Don't over-explain or include unnecessary personal details. The compliance team wants facts, not a biography.
What NOT to Send
Protecting your personal information matters. Here is what to keep out of your submission.
Redact transactions unrelated to income. Your casino does not need to see every coffee you bought. Black out or redact outgoing transactions that are not relevant – but keep incoming salary or income payments visible.
Don't send your full tax ID or National Insurance number unless specifically asked. A P60 showing your income is fine, but cover any sensitive reference numbers the casino has not requested.
Don't send documents for other household members. Only provide information about your own finances unless a joint account is your funding source.
Never send passwords, PINs, or card security codes. No legitimate casino will ask for these.
Heads Up
If a casino asks you to send documents via an unencrypted email, request a secure upload link instead. Most regulated operators have a dedicated document upload portal.
How Long Does the Check Take?
Processing times vary. Here is what we typically see across the casinos we track:
- Fast operators: 24–48 hours after you submit complete documents
- Average: 3–5 business days
- Slow end: Up to 7 business days, especially during weekends or holidays
The biggest cause of delays is incomplete submissions. If you send blurry photos, cropped statements, or documents missing your name, expect a follow-up request that resets the clock.
Submit everything clearly the first time. Match the name on your documents to the name on your casino account. Include all pages of bank statements – even if some pages only show outgoing transactions.
Once the check clears, your withdrawal should process according to the casino's standard withdrawal processing times. Most players only need to complete a SOF check once, though casinos may ask again if your deposit patterns change significantly.
For details on which payment methods require additional verification steps, check our dedicated comparison.
FAQ
Is it safe to send a bank statement to a casino?
Yes – if the casino is licensed and uses a secure upload portal. Regulated operators must store your data in compliance with GDPR and data protection laws. Avoid sending sensitive documents over unencrypted email when possible.
Can a casino refuse my source of funds?
Yes. If your documents are incomplete, inconsistent, or raise concerns, the casino can reject them and ask for additional evidence. In rare cases, they may close your account and return your deposits.
What if I'm self-employed?
Self-employed players can provide tax returns (SA302 in the UK), business bank statements, accountant references, or invoices showing income. A brief explanation in your SOF letter helps the compliance team understand your income structure.
Do all casinos require source of funds?
Not every session triggers a check. It depends on the operator's policies and your deposit/withdrawal amounts. However, all licensed casinos reserve the right to request SOF documentation at any time.
What triggers a source of funds check?
Common triggers include cumulative deposits above £2,000–£5,000, large withdrawal requests, rapid increases in deposit amounts, or routine compliance reviews. Exact thresholds vary by operator and jurisdiction.
Can I redact transactions on my bank statement?
Yes – you can redact outgoing transactions that are not relevant to your income. Keep all incoming payments visible, along with your name, account number, and statement dates. Check with the casino first, as some require unredacted statements.
What happens if I don't complete the check?
Your account will usually be restricted. Pending withdrawals stay frozen until you provide the requested documents. If you never complete the check, the casino may eventually close your account and return deposited funds to your original payment method. If a casino is stalling or refusing to pay after you have submitted everything, see our guide on what to do when a casino won't pay.