A signed contract, power of attorney or overseas filing can fail for one simple reason: the person who signed it was not authorised to bind the company. Before documents leave the UK or are presented to a bank, counterparty, registry or consulate, taking time to verify corporate signatory authority protects the transaction from delay, rejection and avoidable legal exposure.

For international matters, the question is rarely limited to whether someone is listed as a director. The receiving organisation may require clear evidence that the company exists, that the signatory holds the stated role, and that the company has properly approved the particular document or transaction.

What corporate signatory authority means

Corporate signatory authority is the legal power given to an individual to sign documents, make declarations or enter into obligations on behalf of a company. That authority can arise in different ways. A director may have authority under the company’s articles of association. A board may pass a resolution appointing one or more authorised signatories. An employee may be granted limited authority through a power of attorney or a specific mandate.

The right evidence depends on the company, the document and the recipient’s requirements. A routine commercial letter may be signed by an authorised manager. A high-value guarantee, overseas property document or deed will usually demand a more formal chain of authority.

This distinction matters because a job title alone is not proof. A chief executive, finance director or company secretary may appear well placed to sign, but their actual authority may be limited by the articles, internal approval rules, shareholder agreements or the terms of a board resolution.

How to verify corporate signatory authority

Start with the company’s constitutional and public records, then work towards the specific transaction. For a UK company, an up-to-date Companies House search can confirm registered details, including directors and persons with significant control. It is a useful starting point, but it does not by itself prove that a particular director can sign every document alone.

The articles of association should then be reviewed. They may set out how directors make decisions, whether a quorum is required, and whether there are restrictions on signing certain agreements. Bespoke articles deserve particular care, as they often depart from the standard position.

Next, establish whether the board has approved the transaction. A board resolution is often the clearest evidence. It should identify the company, describe the transaction or document sufficiently precisely, record the decision to approve it, and name the person or persons authorised to sign. For sensitive overseas use, it is usually helpful for the resolution to state that the signatory may sign, deliver and complete any related documents, where this is genuinely intended.

Where authority is delegated, ask to see the underlying delegation. This may be a power of attorney, signing policy, committee resolution or mandate. Check its date, scope and whether it remains in force. A broad-looking power of attorney may have expired, been revoked or apply only to a defined project.

Finally, confirm the signatory’s identity and role. The name on their passport or other photo identification should match the name used in the resolution and the document. Any difference, such as a middle name, former name or spelling variation, should be explained before notarisation. Small inconsistencies can create disproportionate problems when a foreign authority is reviewing the paperwork.

Check the execution rules for the document

Authority and execution are connected, but they are not the same thing. A person may have authority to approve a transaction yet still sign the document in the wrong legal form.

For example, a company can generally execute a simple contract through an authorised signatory. The execution of a deed is more formal. Under section 44 of the Companies Act 2006, a company may execute a document by two authorised signatories, usually two directors or a director and company secretary, or by one director signing in the presence of a witness who attests the signature. A company may also act through an attorney appointed under a valid power of attorney.

The document wording, governing law and recipient’s instructions all matter. A foreign registry may insist on two directors even where UK law permits another method. Conversely, a local lawyer may provide an execution block designed for their jurisdiction. Do not amend it casually. Confirm what the receiving authority will accept before the document is signed.

Documents commonly used as evidence

There is no universal corporate authority pack, but a recipient or notary may ask for a combination of company and transaction-specific documents. The most common are:

• a recent Companies House record or certificate of incorporation;
• the company’s articles of association;
• a current board resolution or written directors’ resolution;
• a power of attorney or delegated authority document, where applicable;
• identification for the signatory and, where required, the directors approving the authority; and
• the final form of the document to be signed.

For a group company, more may be required. If a parent company is authorising a subsidiary’s transaction, it may be necessary to trace the authority through both entities. Overseas counterparties also sometimes request a certificate of incumbency, register of directors, shareholder resolution or evidence of the company’s good standing. These requests are not always strictly required under English law, but they may be essential to satisfy the recipient.

When a board resolution is essential

A board resolution is particularly valuable where the transaction is unusual, high value, international or likely to be scrutinised by a third party. This includes opening an overseas bank account, purchasing foreign property, appointing an overseas agent, granting a power of attorney, signing finance documents, establishing a branch, or filing documents with a foreign registry.

It is also sensible where only one director will attend a notarial appointment but the company has several directors. The resolution can make clear that the board has approved the action and has authorised that individual to sign. This avoids any suggestion that the signatory acted alone without the company’s consent.

A resolution should be properly passed in accordance with the articles. Backdating, informal wording or a resolution signed by people who were not directors at the relevant time can undermine the evidence it is meant to provide. If the document is time-sensitive, it is better to prepare the resolution correctly at the outset than to repair the record after a foreign authority has raised queries.

Why overseas use requires extra care

A document intended for use outside the UK may need notarisation, an apostille or consular legalisation. Each stage can expose a weak authority trail. A notary will need to be satisfied about the identity of the signatory, the company’s existence and the signatory’s authority before certifying or witnessing a corporate signature.

An apostille confirms the authenticity of the notary’s signature and seal for use in countries covered by the Hague Apostille Convention. It does not cure an authority defect in the underlying corporate documents. Consular legalisation can involve further checks and country-specific formalities.

Translation is another practical consideration. If the board resolution or company documents must be submitted abroad, the receiving authority may require a certified translation. The translated names, dates, company number and authority wording must accurately reflect the source documents. A mismatch can lead to rejection even where the authority itself is valid.

Common mistakes that cause delays

The most frequent problem is relying on a Companies House listing as the entire proof of authority. It shows who holds office, but not necessarily whether the company approved a particular transaction. Another common issue is producing a resolution that authorises a person to negotiate but not to sign, execute or deliver the final document.

Timing is equally significant. A resolution prepared after the signature date may invite questions, especially in a notarised or legalised document set. Expired powers of attorney, out-of-date company records and unsigned minutes can have the same effect.

Witnessing errors are also avoidable. If execution requires a witness, the witness should be physically present when the signatory signs and should complete their own details accurately. A witness should not sign later from memory, and a recipient may object if the witness appears to have an inappropriate interest in the transaction.

Preparing for a notarial appointment

Send the draft document and supporting corporate papers for review before the appointment whenever possible. This allows any authority gaps to be identified before the signatory attends, rather than when a deadline is close. It also helps establish whether a board resolution needs amendment, whether additional directors must sign, and whether apostille, legalisation or translation will be required.

Bring original identification for the signatory and the final agreed documents. If the company is incorporated outside the UK, provide equivalent official extracts and constitutional documents from the relevant jurisdiction. The more unusual the corporate structure, the more valuable early review becomes.

White Horse Notaries can review the authority evidence alongside the document’s destination requirements, helping corporate clients prepare a clear and reliable signing pack for overseas use. The aim is not to create unnecessary paperwork. It is to ensure that the evidence matches the transaction, the execution method and the standards of the organisation receiving it.

A well-prepared authority trail gives the signatory confidence to sign and gives the recipient confidence to rely on the document. When a transaction crosses borders, that clarity is often what keeps an urgent matter moving.