- November 5, 2026
- Posted by: Stephen Williamson
- Category: News, Property Market
AI can now produce a convincing fake bank statement in minutes. For estate agents, that changes what a source of funds check has to do.
A source of funds check establishes where a buyer’s money came from. A bank statement only shows that the money is there. Under HMRC’s consolidated anti-money laundering guidance manual, published on 8 July 2026, the check is not finished until you understand the story behind the money and record why you believed it.
It’s Friday afternoon. A cash buyer has offered asking price on a three-bed semi and wants a quick exchange. Within the hour, a crisp PDF bank statement lands in your inbox showing £400,000 sitting comfortably in a savings account. The logo is right, the layout is right, the balance is right.
Your negotiator files it, accepts the offer and sends out the memorandum of sale. The question nobody asked: was the statement real, and where did the money come from?
Why are fake bank statements suddenly so easy to produce?
Because faking one no longer needs skill or software. A convincing fake used to need both. Now it needs a prompt, and the result has transactions, balances and branding that pass a glance.
Cifas recorded more than 444,000 fraud cases in 2025, a UK record and a 6% rise on the year, and warns that AI is letting criminals create fake documents and synthetic identities “at speed and scale” (Cifas, Fraudscape 2026, published 12 March 2026).
A statement that looks right is no longer evidence that it is right.
What does HMRC mean by source of funds?
Where the money came from, not where it is sitting. HMRC’s revised guidance, published on 8 July 2026 as a single consolidated anti-money laundering guidance manual, draws a clear line: a bank statement shows that money exists, not where it came from. Source of funds means understanding the story behind the money, whether that’s a salary, a business, an inheritance or the sale of another property.
Two points matter most for agents.
Timing. Buyer checks should start as soon as possible, ideally before an offer is accepted, and be complete before a deposit is taken to secure the property. Seller checks come before you market. Our guide to when to undertake customer due diligence (CDD) sets out the stages in order.
No passing the buck. The buyer’s solicitor or bank doing their own checks does not transfer your responsibility.
HMRC also singles out gifted deposits, cash purchases and crypto proceeds for closer attention.
What are the red flags in a fake bank statement?
Most fakes give themselves away to a trained eye, either in the document or in the story around it.
|
In the document |
In the story |
|---|---|
|
A screenshot, scan or re-saved file instead of the bank’s own PDF |
Funds don’t fit the buyer’s age, job or stated circumstances |
|
The running balance doesn’t add up line by line |
Pressure to move fast or skip “the paperwork” |
|
Too clean: no direct debits, card spending or everyday life |
Reluctance to send the original or to explain a large credit |
|
A large, round-sum credit just before the statement ends |
The funding source changes late in the deal |
|
Name or address that doesn’t match the buyer’s ID |
A third party paying, or a request to change payment details |
|
Odd fonts, misaligned columns or a file created after the statement date |
A story that gets vaguer the more you ask |
Any one of these can have an innocent explanation. Several together justify pausing the sale until you have answers. Our CDD case study shows how the signals stack up in practice, and the warning on fraudsters targeting the property sector covers the wider pattern.
Which five checks should you do before the memorandum of sale goes out?
These five, and between them they take minutes.
- Get the document from source. Ask for the PDF downloaded directly from online banking, not a screenshot or a forwarded copy. Where your onboarding platform offers open banking verification, use it: the data comes straight from the bank, so there is no document to fake.
- Do the maths. Check the running balance against the transactions. Fabricated statements often look right but fail simple arithmetic.
- Follow the money back. For any large credit, ask where it came from and get the evidence: a completion statement for a property sale, estate accounts for an inheritance, payslips or accounts for savings built over time.
- Check the giver, not just the gift. For a gifted deposit, identify the giver, see their own statement showing the funds leaving, and get a signed gift letter confirming it isn’t a loan.
- Write down your reasoning. A short note saying what you were told, what you saw and why it made sense is what HMRC will look for.
On high-value and higher-risk purchases, these five sit alongside enhanced due diligence rather than replacing it.
How do you check a crypto-funded buyer’s source of funds?
The same way, with one extra link in the chain. Ask for exchange statements showing the sale, the transfer into a UK bank account, and evidence of the money used to buy the crypto in the first place. If the trail breaks, the check isn’t done.
What do you do when something doesn’t add up?
Start with a neutral request (“Could you send the statement straight from your online banking?”) and hold the sale until you have an answer.
If the explanation still doesn’t stand up, take it to your Money Laundering Reporting Officer (MLRO) straight away. They decide whether a Suspicious Activity Report (SAR) goes to the National Crime Agency (NCA) and whether a defence is needed before the deal continues.
From that point, keep the concern within the business: telling the buyer or anyone else that a report is being considered could amount to tipping off, an offence under section 333A of the Proceeds of Crime Act 2002.
The document was never the point
Fraud is betting on the pressure of a Friday afternoon: a deal moving fast, a document that looks right, and nobody with a reason to look twice. The five checks above take minutes, and they work whether a statement was edited by hand or generated by AI. What makes the file defensible is not the statement you collected. It is the note explaining why you believed it.
Are your AML Policies, Risk Assessments and working practices still based on the previous HMRC guidance?
FCS Compliance can support property businesses through policy and risk assessment reviews, staff training, CDD file audits, AML health checks and HMRC inspection readiness support.
Frequently asked questions
Is a bank statement enough for a source of funds check?
No. A bank statement evidences that money exists in an account. A source of funds check has to establish where that money came from, and record why the explanation was credible.
When must an estate agent complete source of funds checks?
Buyer checks should start as soon as possible, ideally before an offer is accepted, and be complete before a deposit is taken to secure the property. Seller checks come before the property is marketed.
Does the buyer’s solicitor or bank doing checks cover the agent?
No. Another regulated firm carrying out its own due diligence does not transfer the agent’s responsibility under the Money Laundering Regulations.
What should a source of funds file note contain?
What you were told, what you saw, and why it made sense. HMRC looks for recorded reasoning, not just a folder of collected documents.
About this Author
Stephen Williamson, MICA (AML Dip), Lead AML Consultant, FCS Compliance.
Stephen spent 17 years working in the banking industry, specialising in both property finance and managing fraud and anti-money laundering teams for a range of organisations, from tier 1 banks to electronic money institutions. Stephen also has first-hand experience of the London property market, having spent many years both working for and running a property development firm. He is a member of the International Compliance Association (ICA), holding a Diploma in Anti-Money Laundering.
