The Invoice's Last Mile: A UK Bank-Details Checklist for Sole Traders and Small Companies

An invoice is only as good as the payment details printed on it. A single transposed digit in a sort code, a building society roll number left out, or an account name that no longer matches the bank's records can delay payment, trigger a recall, or send money into a fraudster's account. The last mile of an invoice is therefore not a clerical afterthought. It is a control point.

For sole traders and small companies, the risk is practical rather than abstract. Staff change, banks merge, trading names differ from legal names, and email accounts can be compromised. The following field guide sets out what each piece of information does, where Confirmation of Payee helps, and what to check before your bank details go out or someone else's details are used to pay you.

The anatomy of a UK payment instruction

A domestic UK payment usually needs three core pieces of information: the account name, the sort code and the account number. The sort code is six digits and identifies the bank and branch, although many banks no longer use it to identify a physical branch. The account number is usually eight digits. The account name should match the name held by the bank, not necessarily the trading name on the invoice.

Some building society accounts use a roll number in addition to the sort code and account number. If a customer or supplier has a passbook-style account, check whether a roll number is required. Omitting it can cause the payment to fail or be returned.

For international payments, an IBAN and BIC or SWIFT code are normally needed. The IBAN identifies the account across borders, while the BIC identifies the bank. Do not assume that a domestic sort code and account number will work for an overseas transfer, and do not assume that an IBAN is needed for a UK domestic payment. Mixing the two formats is a common source of delay.

Confirmation of Payee: a check, not a guarantee

Confirmation of Payee, often shortened to CoP, is a UK service that lets a payer check whether the account name they have entered matches the name held by the recipient's bank. It usually returns one of several outcomes: a match, a close match, no match, or a message that the check is unavailable. A close match may be correct, for example where a middle name is omitted or a trading name is used. A no-match result is a warning, not proof of fraud, but it should pause the payment until the details are verified.

CoP does not confirm that the recipient is honest or that the invoice is genuine. It only checks the relationship between the name and the account details. Fraudsters can use real accounts in their own names, so a matching name does not remove the need to verify the payment request through a known channel. If an email asks you to change bank details, telephone the supplier on a number you already hold, not the number in the email.

A pre-invoice checklist

Before an invoice leaves your business, check your own payment details line by line. Confirm the account name exactly as your bank holds it. Check the sort code and account number against a recent bank statement or online banking record, not against an old invoice template. If you use a building society account, include the roll number. If you accept international payments, state the IBAN, BIC and currency clearly. Put the details in a consistent block rather than scattering them through footnotes.

Before paying a supplier, use the same discipline in reverse. Verify the sort code and account number against a previous known invoice or a direct confirmation with the supplier. Run Confirmation of Payee where your bank offers it. If the result is a close match, decide whether the difference is explainable. If it is a no match, stop and verify. Consider a dual-control process for larger payments, where a second person reads the digits aloud or checks them against the source document.

Keep a record of when bank details were last verified and by whom. If a supplier changes bank details, treat that as a high-risk event rather than a routine update. A phone call to a known contact is usually faster than recovering a misdirected payment.

If a payment goes astray

Contact your bank immediately if you think a payment has been sent to the wrong account or to a fraudster. Ask for a recall or recovery request. Faster Payments are not reversible in the way that card payments can be, but banks can ask the receiving bank to return funds. Recovery is not guaranteed, and the sooner the request is made, the better.

If you suspect fraud, report it to your bank and to Action Fraud. Keep copies of the invoice, emails, chat messages and payment confirmation. If the error is a simple mistake, such as a transposed digit, the receiving bank may contact its customer for consent before returning the money. That can take time, which is why prevention is the better control.

Keep the details tidy

Bank details age badly. Old sort codes appear on templates, trading names change, and staff leave. Review the payment details on your invoices at least annually and whenever your banking arrangements change. Remove unused account details from templates and websites. For small teams, a simple rule works well: one person prepares the payment, another checks the digits, and nobody changes bank details on the strength of an email alone.

The invoice's last mile deserves the same attention as the work that earned the payment. Check the name, the number and the sort code before the document goes out, and verify them again before money goes out the door.