An affidavit may need to be apostilled when it is being used abroad as a sworn statement for legal, immigration, property, family, business or court-related matters.

Because an affidavit is a formal legal statement made under oath or affirmation, it must be prepared and signed correctly before apostille legalisation. In most cases, the affidavit will need to be sworn or affirmed before a UK solicitor, Notary Public or another authorised person before it can be apostilled.

This guide explains when an affidavit may need an apostille, how to prepare it correctly and what to check before using it overseas.

When might you need an affidavit apostille?

You may need to apostille an affidavit if a foreign authority, court, lawyer, notary, embassy or government office asks for a legalised sworn statement.

Common reasons include:

• Court proceedings abroad
• Immigration applications
• Visa applications
• Family law matters
• Property transactions overseas
• Inheritance or probate matters
• Name or identity confirmation
• Marital status confirmation
• Business or company matters
• Financial declarations
• Parental consent or family declarations
• Supporting evidence for foreign legal procedures

The exact requirement depends on the destination country and the authority requesting the document.

What is an affidavit?

An affidavit is a written statement of facts that is sworn or affirmed to be true.

The person making the statement is usually called the deponent. The affidavit is normally signed in front of an authorised professional, such as a solicitor, commissioner for oaths or Notary Public.

An affidavit may be used to confirm facts such as:

• Identity
• Address
• Relationship status
• Family circumstances
• Financial information
• Ownership
• Consent
• Legal declarations
• Business authority
• Supporting evidence in legal proceedings

Because it is a sworn statement, the wording should be accurate and appropriate for the purpose.

What does the apostille confirm?

An apostille confirms that the signature, stamp or seal on the affidavit or its certification is genuine.

For most affidavits, the apostille confirms the signature of the UK solicitor, Notary Public or authorised person who witnessed the oath, affirmation or signature.

The apostille does not confirm that the contents of the affidavit are true. It only authenticates the UK signature or certification so the affidavit can be recognised abroad.

Why affidavits must be signed correctly

An affidavit is not just a simple letter. It is a sworn legal statement, so the signing process matters.

The affidavit may need to be:

• Signed in front of a solicitor
• Sworn before a commissioner for oaths
• Affirmed before an authorised person
• Notarised by a Notary Public
• Signed with specific wording
• Bound or attached to supporting documents
• Prepared in a format required by the foreign authority

If the affidavit is signed incorrectly, it may be rejected before or after apostille.

Solicitor, commissioner for oaths or Notary Public?

The right person to witness or certify the affidavit depends on what the receiving authority requires.

A UK solicitor or commissioner for oaths may be suitable for many routine affidavits.

A Notary Public may be required for:

• Foreign court proceedings
• Property transactions abroad
• Embassy submissions
• Inheritance matters
• Business or company documents
• Countries with stricter notarial requirements
• Affidavits drafted by foreign lawyers or notaries

If the foreign authority asks for a notarised affidavit, solicitor witnessing may not be enough.

What should an affidavit include?

The content depends on the purpose of the affidavit, but it should usually be clear, structured and specific.

An affidavit may include:

• Full name of the person making the statement
• Address
• Date of birth, if required
• Passport or ID details, if required
• Clear statement of facts
• Purpose of the affidavit
• Reference to supporting documents, if relevant
• Signature of the person making the statement
• Oath or affirmation wording
• Signature and stamp of the solicitor or notary
• Date and place of signing

If the foreign authority or lawyer has provided wording, it should be followed carefully.

Affidavit vs statutory declaration

Affidavits and statutory declarations are similar, but they are not always interchangeable.

An affidavit is usually a sworn or affirmed statement, often used in court or legal proceedings.

A statutory declaration is a formal declaration made under statute and may be used for administrative or legal purposes.

Foreign authorities may ask for one specifically. If they request an affidavit, do not substitute a statutory declaration unless they confirm it is acceptable.

Original affidavit or certified copy?

For overseas use, the original signed affidavit is usually required.

This is especially important where the document is being used for:

• Court proceedings
• Immigration files
• Property transactions
• Inheritance matters
• Family law matters
• Embassy submissions
• Legal representation abroad

A certified copy may be accepted in some cases, but only if the receiving authority confirms this.

If the affidavit must be sworn or notarised, do not sign it before the appointment unless instructed to do so.

Affidavits with supporting documents

Some affidavits refer to supporting documents, also known as exhibits or attachments.

These may include:

• Passport copy
• Birth certificate
• Marriage certificate
• Deed poll
• Bank statement
• Utility bill
• Company document
• Power of attorney
• Court document
• Property document

If supporting documents are attached, check whether they need to be certified, bound, translated or apostilled separately.

Does an affidavit need translation?

If the affidavit is being used in a non-English-speaking country, translation may be required.

Translation may be needed for:

• Court proceedings
• Immigration applications
• Family law matters
• Property transactions
• Business matters
• Probate or inheritance cases
• Embassy submissions

Depending on the country, the translation may need to be certified or sworn. Some authorities require the affidavit to be apostilled first and then translated, while others may require a bilingual affidavit from the beginning.

Paper apostille or e-Apostille?

For affidavits, a paper apostille is often the safest option, especially where the document will be physically submitted to a court, embassy, lawyer, notary, immigration office or foreign authority.

A paper apostille may be preferred for:

• Court proceedings
• Immigration matters
• Property transactions
• Family law cases
• Inheritance matters
• Embassy submissions
• Legal declarations

An e-Apostille may be suitable only if:

• The affidavit is eligible for digital legalisation
• The signing or certification is completed in an accepted digital format
• The receiving authority accepts e-Apostilles
• The document will be submitted online
• A physical original is not required

Before choosing an e-Apostille, confirm that the receiving authority accepts digital legalised affidavits.

Do you need embassy attestation?

If the affidavit is being used in a country that accepts apostilles, the apostille is usually the main authentication step.

However, if the destination country is outside the Hague Apostille Convention, embassy or consular attestation may also be required after the apostille.

This can apply to countries such as:

• UAE
• Qatar
• Kuwait
• Saudi Arabia
• Vietnam
• Thailand
• China
• Some other non-Hague countries

Embassy attestation is common for affidavits used in legal, property, immigration and business matters in non-Hague countries.

Common reasons affidavit apostilles are rejected

An affidavit may be delayed or rejected if it is not prepared correctly.

Common issues include:

• The affidavit was signed before the witnessing appointment
• The oath or affirmation wording is missing
• The solicitor or notary details are incomplete
• The document was not notarised when notarisation was required
• Pages are missing or not securely attached
• Supporting documents are not properly certified
• The wording does not match the foreign authority’s requirement
• Translation was required but not provided
• Embassy attestation was required but not completed
• The wrong apostille format was chosen

Because affidavits are formal legal documents, checking the requirements before signing is especially important.

How long does an affidavit apostille take?

The timescale depends on whether the affidavit is already correctly prepared and whether solicitor or notary witnessing is required.

At The Apostille Office, the main apostille service options are:

• Premium Apostille Service — 1 working day
• Express Apostille Service — 5 working days

You should also allow extra time for drafting, solicitor or notary appointment, translation, embassy attestation or international courier delivery if required.

Affidavit apostille checklist

Before submitting an affidavit for apostille, check:

• Has the foreign authority provided wording or a template?
• Does the affidavit need to be sworn, affirmed or notarised?
• Should it be signed before or during the appointment?
• Are all pages complete and securely attached?
• Are supporting documents included?
• Do supporting documents need separate apostilles?
• Is translation required?
• Is a paper apostille required?
• Is embassy attestation required?
• Is there a court, visa or legal deadline?

Checking these points early can help avoid rejection and delays.

Need help apostilling an affidavit?

If you need an affidavit apostilled for overseas use, our team can help prepare the document correctly.

We can advise whether solicitor witnessing or notary certification is needed, arrange apostille legalisation, and help with translation, embassy attestation or secure delivery where required.

Contact The Apostille Office on +44 (0) 204 630 6700 and we will guide you through the correct process for your destination country.