A bank has sent you a form for an overseas account, loan, property purchase or company mandate, with the instruction: “signature to be notarised”. The immediate question is usually: do banks require notarised signatures? The short answer is no, not as a general rule. However, a particular bank may require one where its internal compliance policy, the law of another country or the nature of the transaction calls for greater certainty about identity and authority.

For a routine UK personal banking matter, a notarised signature is uncommon. Banks usually verify customers through their own identity checks, branch procedures or secure digital systems. The position changes when documents will be relied upon overseas, when a signatory is acting for a company or someone else, or when the transaction involves substantial assets or heightened fraud risk.

When banks may require a notarised signature

A bank may ask for notarisation when it needs independent confirmation that the person signing is who they say they are, understood the document and signed it voluntarily. This is particularly common with foreign banks, which may not be able to conduct their usual customer checks on a person based in the UK.

Typical examples include opening or operating an overseas bank account, granting a power of attorney for use abroad, signing loan or mortgage documents, changing account mandates, confirming specimen signatures, dealing with an estate, or authorising investments and transfers. Corporate clients may also be asked to notarise board resolutions, powers of attorney, certificates of incorporation or documents appointing authorised signatories.

The requirement is not always limited to the signature itself. A bank may request a notarial certificate, certified copies of passports and proof of address, company documents, or evidence that the person signing has authority to bind the company. If the documents are intended for another country, an apostille or consular legalisation may also be required after notarisation.

A notarised signature is not the same as a witnessed signature

This distinction is a frequent source of rejected documents. A witness generally confirms only that they saw someone sign. They do not necessarily verify identity to a legal standard, assess capacity, check authority or prepare a formal certificate for international use.

A Notary Public performs a more formal function. The notary will establish the signer’s identity, consider their capacity and willingness to sign, review the document and any relevant supporting evidence, and witness the signature where required. The notary then applies their signature and official seal, usually with a notarial certificate explaining what has been verified.

For company documents, the notary may need to see the company’s constitutional documents, current company information, board minutes or resolutions, and evidence of the signatory’s role. This is not unnecessary administration. It allows the notary to give the receiving bank a reliable statement about who signed and under what authority.

Why overseas banks ask for notarisation

Foreign banks operate under their own local laws, regulatory expectations and risk controls. They may have no practical way to verify a UK resident’s identity, confirm a company’s authority or assess whether a power of attorney is valid. A properly notarised document gives them an independent record from a regulated legal professional.

Requirements vary considerably by country and by institution. One bank may accept a UK notarial certificate and apostille. Another may require legalisation by its embassy or consulate. Some will accept electronic or remote notarisation only in limited circumstances, while others require an original wet-ink document bearing the notary’s seal.

It is therefore not safe to assume that a document accepted by one bank will be accepted by another. Even two branches of the same international banking group may apply different procedures depending on where the account is held.

Do banks require notarised signatures for UK accounts?

Most UK banks do not routinely require notarised signatures for standard personal accounts, ordinary account changes or day-to-day instructions. Their own anti-money laundering and fraud-prevention processes normally cover identity verification. A bank may instead ask you to attend a branch, use an approved identity-checking service or provide documents certified by a professional.

There are exceptions. A UK bank may request enhanced evidence where an account is being opened remotely, where a customer lives abroad, where a third party will operate the account, or where corporate signing authority is unclear. It may also require a notarised power of attorney if the document was created overseas or is intended to be relied upon across borders.

The decisive point is the bank’s written requirement. If its form says “notarised”, do not substitute an ordinary witness, solicitor certification or certified copy unless the bank has confirmed in writing that it will accept this alternative. These services have different legal effects, and an incorrect certification can delay a time-sensitive transaction.

Check the bank’s wording before booking an appointment

Before arranging notarisation, obtain the bank’s instructions in full. A screenshot of a portal message can help, but the form itself, any guidance notes and the exact destination country are more useful. Small wording differences matter. “Notarised signature”, “signature witnessed by a notary”, “notarial acknowledgement” and “certified true copy” are not always interchangeable.

You should also ask the bank whether it needs an apostille or consular legalisation, whether the notarial certificate must follow a prescribed format, and whether it will accept electronic documents. Confirm how many original copies are required and whether a translation is needed. If a document has to pass through an embassy or foreign ministry, build this into your timetable rather than treating notarisation as the final step.

Where the form is in another language, a notary may require a reliable translation or sufficient explanation of its purpose before notarising it. This protects the signer and helps ensure the certificate accurately records the act performed.

What to take to a notary

For an individual, bring the unsigned document, valid photographic identification and recent proof of address. A passport is usually the most straightforward form of photographic ID. The notary may request additional documents depending on the transaction, your country of residence and the receiving bank’s instructions.

For a company, preparation is often more involved. The notary may need the company number, details of directors and shareholders, incorporation documents, board resolutions and evidence that the proposed signatory has authority. If the company is incorporated outside the UK, equivalent foreign corporate records may be required.

Do not sign in advance if the bank has requested notarisation of the signature. In many cases, you must sign in the notary’s presence. If you have already signed, tell the notary before the appointment rather than attempting to alter or re-sign the document without advice.

Can this be handled remotely or at your location?

Sometimes, but acceptance depends on the bank and country. Remote online notarisation can be a practical option for certain documents and jurisdictions, particularly where the receiving institution expressly accepts it. It can save time for clients outside London or those managing urgent international matters.

However, some banks and consulates still insist on a physical original with a wet-ink signature and seal. Mobile appointments may be helpful where several directors need to sign, where an original document cannot leave an office, or where travel is difficult. The right route should be chosen around the receiving bank’s rules, not simply the quickest-looking option.

Avoid the common causes of rejection

Bank documents are often rejected because the wrong form of certification was used, the signer lacked documented authority, an apostille was missing, or the notarial wording did not meet the bank’s stated requirement. Problems also arise when identification is out of date, company information is incomplete or the form was signed before the notary could witness it.

A careful review at the outset is usually faster and less expensive than correcting a document after it has been sent overseas. White Horse Notaries can review the bank’s requirements, identify whether notarisation, apostille or legalisation is needed, and help organise the process with transparent pricing and practical timescales.

For any banking document, the safest approach is simple: obtain the exact requirements from the receiving bank, preserve the original instructions and have the document prepared for the country where it will be used. That small amount of preparation can prevent a costly delay at the point when the funds, account or transaction matter most.