Table of Contents▼
Casino Source of Funds Letter Template – What to Send and Why They Ask
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.
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.
The check protects everyone. It keeps criminal money out of the gambling system and helps operators meet their legal obligations. What it does not do is fire at random – there are specific thresholds behind it, and they differ depending on who licenses the casino.
When Is a Source of Funds Check Triggered?
Most of the checks below run in the background and never reach your inbox. A document request usually lands only when an automated check flags something, or when your deposits jump well past what the operator already knows about you. Here is what sits behind the email, as of October 2026:
| Check | Who runs it | Trigger | What it involves |
|---|---|---|---|
| Financial vulnerability check (UK) | UKGC-licensed online operators | Net deposits (deposits minus withdrawals) over £150 in a rolling 30 days | Public-record search for bankruptcy, CCJs, IVAs and debt relief orders. No documents from you |
| Financial risk assessment – stage 1 (UK) | The largest UKGC operators | Net deposits over £5,000 in 24 hours (aged 25+) or £2,500 (under 25) | Credit-reference check, document-free for 97% of pilot customers. Start date not yet confirmed |
| Financial risk assessment – final stage (UK, planned) | UKGC operators | Net deposits over £1,000 in 24 hours or £3,000 in 90 days (25+); £750 / £2,000 (under 25) | Same assessment at lower thresholds, phased in "in due course" |
| Customer due diligence (EU AML rules) | MGA and other EU-licensed casinos | Stakes or winnings of €2,000 or more, in one transaction or linked ones | ID first, then source of funds if the pattern needs explaining |
| Operator risk triggers | Every licensed casino, including Curaçao and Anjouan | Large withdrawals, sudden deposit spikes, payment methods in someone else's name | The full document request this guide is about |
Two things trip people up here. First, the UK numbers are net deposits, not net losses – withdrawing your winnings lowers the figure, losing them does not. Second, the financial risk assessment is still being staged in: the Gambling Commission set the thresholds on 7 July 2026 but had not confirmed the stage 1 start date by early October. Treat any "£1,000 a day affordability check" claim as a future rule, not today's.
Withdrawals are where most players meet the EU threshold in practice. A €2,000 cashout at an MGA casino is the classic moment – Rizk is a live example, and our trust check on Rizk shows how those checks read from the player side.
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. Pick the rows that match how you actually earn the money you gamble with:
| Document | What it proves | Typical requirement | Best for |
|---|---|---|---|
| Bank statements | Income landing in your account, and that deposits leave an account in your name | Last 3 months, every page, PDF from your bank | Everyone – it is the default request |
| Payslips | Employment income that matches the salary credits on your statement | Last 1–3 payslips | Employed |
| P60 or tax return (SA302 in the UK) | Annual income over a full tax year | Latest tax year | Self-employed, or several income streams |
| Business bank statements, invoices or an accountant's letter | Trading income that does not arrive as a salary | Same period as your personal statements | Self-employed |
| Savings account statement | Money built up over time, not deposited last week | Recent statement showing balance and your name | Funding play from savings |
| Investment or dividend statements | Returns or sale proceeds from a portfolio | Statement or contract note covering the payout | Investors |
| Completion statement or probate document | A one-off lump sum from a property sale or inheritance | The legal document plus the bank statement showing it arrive | Lump sums |
The last column matters more than it looks. Sending payslips when your deposits came from an inheritance answers a question nobody asked, and the compliance team will simply come back for the right document.
Before you hit upload, run through this:
- +Your full name appears on every document, matching your casino account exactly
- +Documents are recent – within the last 3 months unless the casino says otherwise
- +PDFs downloaded from your bank or employer portal, not phone photos of a screen
- +Every page included, even the ones that only show outgoing payments
- Blurry, cropped or edited images – the fastest route to a second request
Download bank statements as PDFs directly from your banking app. Screenshots are often rejected because they are easier to manipulate.
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.
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.
If the check stops being a check and starts being a wall – repeated requests, no explanation, no payout – your source-of-funds file becomes evidence. Start with what to do when a casino won't pay, and if it goes further, our guide to casino complaints and ADR covers where to send it and what the timelines look like.
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?
Large withdrawals, sudden jumps in deposit size, or crossing a regulatory threshold. In the EU, anti-money-laundering rules require checks on stakes or winnings of €2,000 or more. UK operators run an automated vulnerability check once net deposits pass £150 in 30 days, and the largest will add credit-reference assessments from £5,000 in 24 hours once that stage starts. Operators can also ask below any threshold if your activity does not match your known income.
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.