British Passport for a Baby Born in Thailand: First Passport Guide

Applying for a British passport for a baby born in Thailand starts with checking the child’s British citizenship. Many babies born overseas to a British parent are British automatically, but this depends on how the parent acquired their citizenship and the family’s circumstances.

This guide explains the first passport process, supporting documents, translations, baby photographs and countersigning requirements.

Is Your Baby Automatically British?

A baby born outside the UK on or after 1 July 2006 is normally automatically British if, at the time of birth, their mother or father was a British citizen who could pass citizenship to them.

This commonly applies where the British parent was born or adopted in the UK, or became British through naturalisation in their own right before the child was born. However, being born in the UK does not itself prove that a parent is British.

A British parent who was also born overseas may be British by descent and may not automatically pass citizenship to a child born abroad. Some exceptions and registration routes exist, so the parent’s nationality history must be checked.

See the official guidance on British citizenship through a parent.

Do the Parents Need to Be Married?

For babies born now, unmarried parents can pass on British citizenship where the nationality and parentage requirements are met. Being unmarried does not automatically prevent an application through a British father.

Additional checks may be needed to establish parentage. If the mother was married to someone other than the British biological father when the child was born, different nationality rules may apply.

Previous marriages, adoption, surrogacy or uncertainty about legal parentage should be checked before submitting a passport application.

Documents for a First British Passport

The exact documents depend on the child’s nationality claim and family circumstances. A first passport application from Thailand may require:

• The baby’s full Thai birth certificate showing the parents’ details.
• Both parents’ full birth certificates or relevant nationality certificates.
• The British parent’s passport and evidence of British citizenship when the baby was born.
• Both parents’ passports covering the time of conception, where required by the overseas document guidance.
• The Thai parent’s passport and identity card, where applicable.
• Marriage, divorce or name-change documents relevant to the application.
• The baby’s Thai passport, if one has already been issued.
• Evidence of the child’s identity, residence and connection to the parent applying.
• A selection of named and dated family photographs showing the baby with the parents from birth onwards.
• Any relevant court orders concerning the child.
• The completed application form, payment authorisation and two compliant photographs.

Hospital birth records, antenatal records and household registration documents may help support the application. The official overseas guidance also sets out identity and residence evidence requirements; a birth certificate alone may not be sufficient.

Grandparents’ documents may be required, particularly where a parent was born on or after 1 January 1983 and their British nationality needs to be traced through their parents.

Use the document checklist linked from the official first child passport guidance for Thailand. The list above is a preparation guide, not a complete checklist for every family.

Translations and Original Documents

Documents that are not in English must be fully translated by a professional translator. This includes Thai birth certificates and any Thai identity, address or family documents required for the application.

For submission in Thailand, prepare original supporting documents and colour photocopies as instructed by HM Passport Office. Where a non-British passport must be provided, the overseas guidance requires a full colour copy of every page, including blank pages.

Check that names, dates of birth and spellings are consistent across the application, certificates, passports and translations. Include documents explaining any name changes.

Baby Passport Photograph Rules

For a paper application, provide two identical recent printed photographs measuring 45mm high by 35mm wide. They must be clear, professionally printed and unaltered by computer software.

• The baby must be alone in the photograph.
• No toys, dummies or other objects should be visible.
• Use a plain cream or light grey background.
• A supporting adult’s hand must not appear in the photograph.
• Children under one do not need to have their eyes open.
• Children under six do not need a neutral expression or to look directly at the camera.

Use a real, recent photograph of your baby. Do not use an AI-generated image or digitally alter their appearance.

Check the official printed passport photo requirements before submission.

Who Can Countersign the Application?

A first child passport paper application requires a countersignatory to complete the relevant section and certify one photograph.

They must have known the adult signing the application personally for at least two years and meet the occupation, passport and other eligibility requirements. They must also be able to confirm the baby’s photograph and the adult’s parental responsibility.

They do not need to have known the baby for two years. The two-year requirement relates to the adult making the application.

Read our updated guide to countersigning British passport applications before choosing someone.

How to Apply From Thailand

1. Check citizenship: establish how your baby qualifies for British nationality.
2. Follow the Thailand guidance: obtain the current overseas application form and document checklist.
3. Prepare the evidence: arrange originals, colour copies, translations and photographs.
4. Complete the signatures: the application must be signed by someone with parental responsibility, with the countersignature completed where required.
5. Book submission: follow the official appointment instructions for the UK Visa Application Centre in Thailand.
6. Collect the passport: the centre will contact you when it is ready.

The published Thailand process uses an appointment and paper application documents. If someone attends on your behalf, follow the current representative and photo ID requirements.

Check your appointment confirmation for the current application centre address rather than relying on an old address saved online.

Do You Need to Register the Birth With the UK?

You must register your baby’s birth according to Thai requirements. Registering the overseas birth separately with the UK authorities is optional and is not a condition of applying for a British passport.

A Thai birth certificate can be used with the required translation and supporting nationality evidence. Optional UK consular birth registration does not itself grant British citizenship.

See the official overseas birth registration guidance.

Fees and Processing Times

Overseas child passport applications have a passport fee and a courier charge. Translation costs and any professional assistance are separate. Check the current government charges through the official Thailand application guidance before paying.

Processing can take longer if HM Passport Office needs further evidence, nationality checks or an interview. Allow enough time for a first passport application and avoid booking travel until the passport has been issued and received.

If your child already has a British passport, use our British passport renewal guide. If it is missing, see our lost British passport guidance.

Help With Your Baby’s First Passport

Thai Visa Express’s separate Thailand office can help organise application paperwork, supporting documents, translations and submission arrangements for your baby’s first British passport.

HM Passport Office assesses nationality evidence and decides whether to issue the passport. Contact our Thailand office to discuss your family’s circumstances and the documents you already have.