Paper Trails and Plain Answers: Preparing for a UK Bank’s Money-Origin Review

A request from a bank asking where money came from can arrive at an awkward moment. It may follow a house sale, an inheritance, a large transfer from a relative, or a busy quarter for a small company. The wording can sound accusatory, and the deadline can feel tight. In most cases, however, the request is a routine part of how UK banks meet anti-money-laundering and know-your-customer obligations. The practical task is not to argue the point, but to provide a clear, indexed and proportionate evidence trail.

This guide sets out how to prepare for a money-origin review on a personal or small-business account. It is not legal advice, and individual banks may ask for different documents. The aim is to help account holders respond in a way that is calm, consistent and easy for a reviewer to process.

Two different questions behind one email

Banks often use two related concepts. Source of funds refers to where a particular sum of money came from: a salary payment, the proceeds of a property sale, a gift, a loan, or a business invoice. Source of wealth is broader. It asks how the customer accumulated their overall wealth over time. A bank may ask one question, both, or a follow-up that moves between the two.

For a personal current account, a large deposit may prompt a source-of-funds question. A mortgage application or a private banking review may prompt a source-of-wealth question. For a small company, the bank may need to understand the origin of a payment into the business account and the ownership or control structure behind the company. Those are separate checks, even if they arrive in the same message.

Why the request arrives

UK banks are required to understand their customers and monitor activity. A request can be triggered by a transaction that is large for the account, a pattern that looks unusual, a new account receiving significant funds, a change in ownership, or a periodic review. It does not automatically mean the bank suspects wrongdoing. It means the reviewer needs evidence to close a file.

That distinction matters in practice. A short, factual response with the right documents is usually more effective than a long explanation of why the request is inconvenient. The reviewer is likely working through a checklist. Help them tick the boxes.

What good evidence looks like

Evidence should be legible, recent where relevant, and connected to the customer and the transaction. A bank statement showing a balance is less useful than a document showing how the money was generated. A solicitor’s completion statement is stronger than a screenshot of an online property listing. A payslip with the employer’s name, the employee’s name, the pay period and the net amount is stronger than a bare bank transfer.

Documents should not be altered. Redacting unrelated information may sometimes be acceptable, but wholesale editing or creating a summary in place of the original can cause delays. If a document is in another language, the bank may ask for a certified translation. If a document is held by a third party, such as a solicitor or employer, a letter from that party is often useful.

A personal account document menu

For income from employment, useful items include recent payslips, a P60, an employer’s letter confirming salary and role, or an HMRC tax calculation such as an SA302 for the self-employed. For savings, statements showing the gradual accumulation of funds can help. For a property sale, a solicitor’s completion statement, the contract of sale, or a mortgage redemption statement is usually more persuasive than an estate agent’s brochure.

For an inheritance, a grant of probate, a will, a solicitor’s letter or estate accounts can show the origin and distribution of the money. For a gift, a signed gift letter from the donor is often requested, together with evidence of the donor’s ability to make the gift, such as a bank statement or sale document. The letter should identify the donor, the recipient, the amount, the date and the relationship. For investments, broker statements, contract notes or sale confirmations are helpful. For a loan, provide the loan agreement and evidence of receipt.

Small businesses and sole traders

Business accounts often need a slightly different pack. The bank may ask for recent business bank statements, annual accounts, management accounts, VAT returns, a company tax return, payroll records, or a summary of expected activity. For a specific incoming payment, invoices, contracts, purchase orders and correspondence with the customer can show the commercial basis for the funds.

Where ownership matters, the bank may ask for a company structure chart, details of directors and beneficial owners, and evidence of any recent share sale or director’s loan. A sole trader may be asked for tax returns, accounting records and a simple explanation of how the business generates income. Cash-intensive businesses should be ready to explain cash handling and provide sales records, till reports or supplier invoices where available.

The covering note that saves time

A short covering note can make a disproportionate difference. It should not be a essay. A one-page chronology is often enough: date, amount, description, and the reference number of the document that supports it. For example: 14 March 2026, £42,000, proceeds of sale of 12 Example Road, document 3, solicitor completion statement.

Ask the bank whether it prefers a particular format or secure upload channel. Send documents as separate, clearly named PDFs rather than a single unclear photograph. Keep a copy of everything sent. If the bank asks for more, respond to the specific gap rather than resending the whole pack.

Responding without escalation

First, verify that the request is genuine. Use the bank’s app, secure message service or the phone number printed on a statement or card. Avoid replying to an unexpected email link or sending documents to an address that has not been confirmed. Ask for the exact scope of the request, the deadline and the secure method for supplying documents.

Respond within the deadline where possible. If more time is needed, ask for an extension before the deadline passes. Do not move large sums out of the account in haste, and do not give inconsistent explanations across different documents. If the account is joint, check whether both holders need to consent to the disclosure. For a company, make sure the person responding is authorised to do so.

If the account is restricted

Sometimes a bank places a restriction on an account while checks are completed. That can be stressful, particularly if bills or payroll are due. Ask for the specific information required, a reference number and an indication of the next step. If the delay causes genuine hardship, ask whether the bank can consider access to essential funds while the review continues. Keep the tone factual. A clear paper trail is more useful than a heated call.

Build the pack before the email arrives

Most of this work can be done in advance. Keep a secure folder for identity documents, recent payslips or tax returns, property sale papers, gift and inheritance letters, and business accounts. Update it after a house move, a change of job, a company restructuring or a significant gift. A little organisation now can turn a worrying request into a routine exchange of documents later.

The bank is not asking for a life story. It is asking for evidence that fits the money. A calm chronology, a short covering note and a clean set of documents will usually do more than a lengthy explanation.