Marriage & Family Law in Thailand for Foreigners
From registering your marriage at an Amphoe to navigating divorce and child custody — a practical guide to family law in Thailand for foreign nationals.
Quick Answer
Can foreigners get married in Thailand?
Yes. Foreigners can legally marry in Thailand — either to a Thai national or to another foreigner. Marriage is registered at a district office (Amphoe). The main requirement unique to foreigners is an Affidavit of Freedom to Marry issued by your home country's embassy in Bangkok. Same-sex marriage became legal in Thailand in 2024, open to all couples including foreign nationals.
Marriage Registration Process
Step 1 — Embassy affidavit: Obtain a Certificate of Single Status (Affidavit of Freedom to Marry) from your embassy in Bangkok. Each embassy has its own process — some issue same-day, some require advance appointments. US citizens visit the US Embassy in Bangkok; UK citizens, the British Embassy. Fees vary from USD 50–100.
Step 2 — Translation & legalisation: Have the affidavit translated into Thai by a certified translator, then authenticated at the Thai Ministry of Foreign Affairs (MFA) in Bangkok. This process takes 1–3 business days and costs around 400–800 THB.
Step 3 — District office registration: Both parties attend the Amphoe (district office) together with all documents. Two witnesses are required. The registrar reviews documents and if satisfied, issues a marriage certificate (Tabien Somros). The process takes 30–60 minutes. You can register at any Amphoe in Thailand — your current residence area is convenient but not mandatory.
Embassy Appointment Lead Times
Prenuptial Agreements
A prenuptial agreement (สัญญาก่อนสมรส) in Thailand must be made before the marriage is registered and attached to the marriage registration at the Amphoe. An agreement signed after marriage is not valid as a prenup under Thai law (though a postnuptial agreement may be possible in certain circumstances with legal advice).
Prenups are particularly important for expats who own property, business interests, or significant assets. They clearly define which assets are "pre-marital" (Sin Suan Tua — personal property) vs. acquired during marriage (Sin Somros — marital property). Have a Thai family lawyer draft the agreement to ensure enforceability.
Child Custody & Common-Law Relationships
For children born to a Thai mother and foreign father who are not married, the father has no automatic legal rights — he must legitimise the child through a court process or be present on the birth registration. Children born within a registered marriage have both parents as legal guardians automatically.
Thailand does not recognise common-law marriage for legal purposes. Long-term unmarried partnerships do not grant inheritance rights, hospital decision-making authority, or property rights automatically. Couples in long-term relationships without formal marriage should consider Thai wills and powers of attorney to protect each other's interests.