Filip Gromovic
Filip Gromovic is a Senior iGaming Writer and Slot Reviewer with 5+ years of experience covering online casinos, slot games, bonus offers, and player-focused casino content. He has tested and reviewed hundreds of slot titles, with a strong focus on game mechanics, RTP, volatility, bonus features, mobile playability, and overall entertainment value.
What is the casino trying to establish?
A source of funds check goes beyond confirming your identity. The casino wants to understand where the money connected with your gambling came from and whether your explanation fits the transactions and information it already has about your account.
Clear and targeted request
The casino identifies the funds or activity it is reviewing, explains what information it needs and gives you an official route for submitting evidence.
Needs clarification
You are asked for broad financial information without being told which deposits, period or source the operator is trying to understand.
Closer attention needed
Requests keep expanding, instructions conflict or a long history of accepted deposits is questioned only after you ask to withdraw, without a clear explanation of what changed.
What source of funds actually means
Source of funds means the origin of the particular money used for a transaction or gambling activity. The question is usually: where did this money come from?
A casino may already know who you are and still need to understand the origin of money behind particular deposits, spending or account activity as part of its anti-money-laundering (AML) and financial-crime controls.
There is no single worldwide amount at which every casino must perform a source of funds check. Regulated operators can assess risk differently, taking account of transaction patterns, customer profiles and legal requirements. A fixed financial threshold may be one trigger, but it should not be assumed to be the only one.
The money entering the account
An operator may compare deposits and other payment activity with what it knows about the customer. If the amounts, frequency or pattern need further explanation, the casino may ask where the money came from.
Financial-crime risk
Regulated casino operators can have obligations to prevent gambling accounts from being used to move, disguise or spend criminal funds. Source of funds information can form part of these controls.
Regulatory requirements
The exact obligations depend on the license and jurisdiction covering the casino account. One operator may therefore ask for information at a different stage or level of detail from another.
Activity that no longer fits the profile
A substantial increase in deposits, unusual transaction patterns or other risk factors can prompt an operator to review information that was not required earlier in the relationship.
A source of funds review focuses on the origin of money and financial-crime risk. Some regulated markets also use separate financial vulnerability, affordability or safer-gambling checks. These can involve financial information too, but they serve a different purpose.
What evidence may help explain your source of funds?
The evidence you need depends on the source you are explaining and the casino’s requirements. There is no universal document list for every player. The evidence should connect your explanation with the money or transactions being reviewed.
| Source being explained | Possible supporting information | What it may help establish |
|---|---|---|
| Salary or employment income | Payslips, relevant bank activity, tax or employment records where accepted. | That regular employment income exists and how that money reaches the account used for gambling. |
| Self-employment or business income | Tax records, invoices, business accounts or relevant bank transactions where appropriate. | How business or self-employment income was generated and transferred into personal funds. |
| Savings | Bank or savings-account history showing the accumulation or movement of the money. | That the funds existed before the gambling activity and how they were built up or transferred. |
| Sale of property or another asset | Sale documentation together with the related payment trail. | That a lump sum resulted from a genuine asset sale and reached the relevant account. |
| Investments or dividends | Investment statements, dividend records or evidence of investment proceeds. | The origin of funds received from investments and their connection to the money being used. |
| Inheritance or gift | Relevant estate, transfer or gift documentation where requested and appropriate. | Who supplied the money, why it was received and how it reached the player. |
| Gambling winnings | Casino, betting or other gambling account histories, withdrawal records and related payment evidence. | That the money came from previous gambling activity. The operator may still need to understand where the original deposits came from. |
Before sending bank statements, tax records or other sensitive financial information, ask which source is being reviewed and what evidence is accepted. Confirm the period the documents must cover and which details must remain visible. If redaction is permitted, follow the operator’s instructions.
Before sending financial evidence
- Identify the money being questioned: ask which deposits, withdrawals or other transactions the casino is reviewing, and for what period.
- Ask what the operator is trying to establish: confirm whether the issue is source of funds, source of wealth, payment ownership or another compliance check.
- Get the evidence requirements: confirm the accepted document types, date range and file format. Ask about any rules on redaction.
- Match the evidence to your explanation: send documents that support the source you have described. Avoid including large amounts of unrelated financial information.
- Use the casino’s official secure channel: upload sensitive information through the verified account area or another submission method formally identified by the operator.
- Keep your own record: save what you submitted, the submission date and any upload confirmation. Keep the original request too.
Financial evidence can reveal account numbers, balances and spending patterns. Ask what must be visible and what can be redacted before altering a document. Never provide online-banking or e-wallet passwords, card PINs or authentication codes as proof of source of funds.
Source of funds, source of wealth and KYC are different checks
These terms are sometimes used loosely in support conversations, but they describe different questions. Understanding the distinction can help you avoid sending irrelevant information.
| Check | Main question | Typical scope |
|---|---|---|
| KYC / identity verification | Who are you? | Your identity and account details. |
| Payment ownership | Who controls the payment method? | The relationship between you and a bank account, card, e-wallet or other payment source. |
| Source of funds | Where did this money come from? | The origin of particular funds or transactions used for gambling activity. |
| Source of wealth | How was your wider wealth accumulated? | Your broader financial position and the activities or events that created your overall wealth. |
You can pass an identity check and still receive a legitimate source of funds request later. Proof that you own a bank account may not explain where the money in it came from. If the operator is still checking who you are, whether a payment method belongs to you or whether a document is acceptable, our Casino KYC and verification guide covers those checks separately.
Why source of funds evidence can be challenged
A document can be genuine and still fail to answer the question the operator is investigating. Before sending more evidence, identify the gap between your explanation and what the casino says remains unverified.
The evidence does not cover the activity being reviewed
A bank statement may show genuine income but cover dates that do not explain the deposits or transactions the casino has questioned.
Ask: which period needs to be covered and why.
The money trail is incomplete
Your evidence may establish that an asset was sold or income was received without showing how that money reached the account used for gambling.
Ask: what connection between the source and the gambling funds is still missing.
Important information cannot be checked
A heavily edited or cropped document may hide information the operator says it needs to connect the evidence with your account or transactions.
Ask: exactly which fields must remain visible and what may safely be redacted.
The evidence and account activity do not line up
The source you describe may not appear to explain the amount, timing or pattern of the funds being reviewed.
Ask: which transaction or discrepancy needs further explanation.
Previous gambling winnings do not explain the original deposits
Gambling winnings may not resolve the check if the operator also needs to know where the original deposits into those gambling accounts came from.
Ask: whether the casino requires evidence of the original funding as well as the later winnings.
The casino cannot say what remains outstanding
You have supplied multiple documents, but support keeps asking for more information without identifying the source or transaction that still needs to be explained.
Ask: for one clear list of what is still needed.
How to respond to a casino source of funds request
-
Ask which activity is being reviewed
Find out whether the casino is examining particular deposits, a payment method, a period of gambling activity or your wider customer profile. -
Ask what source the casino wants you to explain
Confirm which source the request concerns, such as salary, savings or previous winnings. Do not assume what the operator needs. -
Check the evidence requirements
Ask which documents are accepted, what date range they must cover and which details need to remain visible. -
Connect the explanation to the money
Provide evidence showing how the source you described produced the funds used for the gambling activity under review. -
Keep proof of what you submitted
Save upload confirmations and a record of document names and submission dates. Keep important correspondence in case the review becomes a dispute. -
Ask what remains outstanding if the review stays open
Do not keep sending unrelated documents indefinitely. Ask the operator to identify what is missing from the information already supplied.
“Please confirm which deposits or period are being reviewed and which source of funds you need me to explain. What evidence will you accept, and is anything else currently outstanding?”
A useful response connects three things: the source you are describing, the evidence supporting it and the movement of the relevant money. Large amounts of unrelated financial information can make the review harder to follow.
When a source of funds check deserves closer attention
A source of funds request can be legitimate even if it is inconvenient or involves sensitive information. Stronger warning signs concern how the casino handles the review, whether it can explain its scope and whether the information requested relates to a clear compliance need.
- The scope keeps expanding: each submission triggers a much broader request without an explanation of why the new period or information is relevant.
- Different teams give conflicting requirements: one department says the check is complete while another continues requesting new evidence.
- The operator cannot identify the unexplained funds: support repeatedly asks for “more source of funds” without saying which deposits or transactions remain unresolved.
- The request covers an unusually broad history: the casino asks for years of financial records but cannot explain why that period is relevant to the activity being reviewed.
- Deposits were accepted while the issue was left unresolved: the operator continued allowing substantial gambling activity but only treated the missing information as urgent when you requested a withdrawal.
- Sensitive evidence is requested through an unusual channel: the submission route cannot be verified through the casino’s official account or support channels.
Operators can have genuine legal reasons for additional checks, including reasons that arise later in a customer relationship. The points above are reasons to ask for clarification, preserve evidence and consider a formal complaint if the process cannot be resolved.
What to do if a source of funds check delays your withdrawal
A source of funds review that delays your withdrawal is not automatically a refusal to pay. Confirm that the review is the reason for the delay and ask what information is still needed. If the payment has other unresolved stages or the casino says it has already sent the money, our Delayed casino withdrawals guide explains how to trace the payout and identify the appropriate escalation route.
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Confirm that source of funds is the reason
Ask whether the withdrawal is otherwise approved and whether the financial review is the only outstanding issue. -
Ask what remains unresolved
Request the specific source, period or transaction the operator says still needs evidence or explanation. -
Keep a timeline
Record when you requested the withdrawal and when the casino first asked for source of funds information. Note what you submitted and how the casino responded. -
Use the casino’s formal complaint process if the review stalls
If ordinary support cannot explain or move the check forward after reasonable attempts, submit a concise formal complaint with the relevant evidence and timeline. -
Check the external dispute route for the casino’s license
Where applicable, identify the alternative dispute resolution (ADR) provider, regulator guidance or other complaint route for the legal entity and license governing your account.
Timing rules differ by jurisdiction
Do not assume that every country treats withdrawal-related source of funds requests in the same way. For example, Great Britain’s Gambling Commission has told operators not to continue accepting deposits indefinitely and then rely on AML procedures to frustrate a withdrawal where the relevant information should have been sought earlier. A genuine legal obligation arising at the time of withdrawal can still require further information.
How source of funds requirements differ between regulatory frameworks
The examples below show how an international standard and two regulated gambling frameworks approach financial due diligence. They do not provide a universal set of thresholds or document rules.
| Framework or market | How source of funds fits into the approach | Official source |
|---|---|---|
| International: FATF | The FATF Recommendations, amended in June 2026, set international AML, counter-terrorist-financing and counter-proliferation-financing standards that countries adapt to their own systems. FATF’s casino-specific guidance expressly includes internet casinos. FATF notes that this 2008 document must be read alongside the current Recommendations because it does not reflect later revisions. | Current FATF Recommendations → Casino-specific guidance → |
| Great Britain: ongoing monitoring | Casino operators must monitor business relationships on a risk-sensitive basis. This includes scrutiny of transactions and, where necessary, source of funds so that activity can be compared with what the casino knows about the customer and their risk profile. | UKGC guidance → |
| Great Britain: higher-risk customers | Enhanced due diligence can require additional information about source of funds and source of wealth. The level of checking depends on the risks identified rather than one universal trigger applied to every customer. | UKGC enhanced due diligence → |
| Malta: remote gaming | The FIAU’s Implementing Procedures contain binding AML and counter-terrorist-financing requirements, with a sector-specific Part II for remote gaming. The approach includes customer due diligence, risk profiling and ongoing monitoring. | FIAU Implementing Procedures → |
| Malta: gambling winnings | FIAU guidance says that where recycled winnings are relied on, operators may need to understand the source of the original deposits when the amounts are substantial or do not fit the customer profile. Generic explanations may not be sufficient. | FIAU remote gaming FAQ → |
Evidence to save if the check becomes a dispute
Keep one organized record of the review, including any changes to the casino’s requests. Account messages and upload histories may later become difficult to retrieve.
- Date the first source of funds request was made
- Deposits, transactions or period being questioned
- The source of funds you explained
- Exact evidence requested by the operator
- Date and method used to submit each document
- Upload confirmation or case reference
- Any rejection or follow-up explanation
- Relevant account or payment screenshots
- Important support chats and emails
- Withdrawal status if a payout is affected
- Relevant source of funds or verification terms
- Formal complaint reference if one is opened
How we checked this guide
Players Time separates general practical guidance from rules that apply only to particular regulated markets. For this guide, we checked current primary sources on AML and gambling regulation, using regulator definitions of source of funds and source of wealth.
- Financial Action Task Force: FATF Recommendations for the international AML, counter-terrorist-financing and counter-proliferation-financing framework, as amended in June 2026.
- Financial Action Task Force: Risk-Based Approach for Casinos for casino-specific context, including internet casinos. FATF identifies this as 2008 guidance and says it should be read alongside the current Recommendations because it does not reflect later revisions.
- UK Gambling Commission: AML glossary for the distinction between source of funds and source of wealth.
- UK Gambling Commission: Ongoing monitoring for risk-sensitive monitoring and source of funds requirements.
- UK Gambling Commission: Account withdrawals for the Commission’s expectations on the timing of source of funds and source of wealth requests.
- Malta FIAU: Implementing Procedures for Malta’s binding AML framework and remote-gaming sector procedures.
- Malta FIAU: FAQs for published guidance on recycled gambling winnings, original deposits and source of wealth information.
