Questions?
We reply within 24 hours, free of charge.
Contents
- In short
- Does Thailand accept an apostille now?
- How does legalisation work until 28 February 2027?
- How are Thai documents legalised for use at home?
- What changes on 28 February 2027?
- Document by document: the route before and after
- What stays uncertain until 30 December 2026 and after?
- What to do with your documents now
Thailand does not accept apostilles yet. Until 28 February 2027 a UK, US or Australian document for a Thai office goes through your own country's certification and foreign-ministry step, then the Thai embassy, then a Thai translation. On 28 February 2027 the Apostille Convention enters into force for Thailand, and an apostille replaces the two middle steps, but only with states that do not object. Rules are as of 7 October 2026.
In short
- On 30 June 2026 Thailand deposited its instrument of accession to the 1961 Convention. It enters into force for Thailand on 28 February 2027, and with Thailand there are 130 Contracting Parties (HCCH).
- Until then Thai embassies do not take apostilles. Washington and Canberra say so on their pages, and London's page describes only FCDO legalisation (embassy pages, 2025 and 2026).
- Existing members can object until about 30 December 2026. A state that objects stays on legalisation with Thailand.
- An apostille replaces the foreign-ministry and embassy steps. It does not replace a Thai translation, an office's own forms or the Probate Court.
- Thailand has not published how it will issue apostilles. The competent authority is the Department of Consular Affairs of its Ministry of Foreign Affairs.
Does Thailand accept an apostille now?
No. Thailand deposited its instrument of accession on 30 June 2026, but the Convention takes effect for it only on 28 February 2027 (HCCH). The Royal Thai Embassies in Washington and Canberra say they do not accept apostilles, and London's page describes only FCDO legalisation. A UK, US or Australian apostille does not yet replace the old chain.
The date comes from Article 12 of the Convention. An accession has effect only with members that raise no objection within six months of the notification, and the Convention enters into force on the sixtieth day after that period (Convention text, HCCH).
| Date | What happened or will happen |
|---|---|
| 9 December 2025 | The Thai Cabinet approved the accession (Department of Consular Affairs, 21 February 2026) |
| 30 June 2026 | Thailand deposited its instrument of accession in The Hague (HCCH) |
| About 30 December 2026 | The objection window for existing members closes |
| 28 February 2027 | The Convention enters into force for Thailand with every state that did not object |
Objections do happen. Germany, Austria and Greece objected to Algeria's accession, and Germany, Austria and Czechia to Vietnam's (Federal Apostille, 29 September 2026). The Convention still took effect for Algeria on 9 July 2026 and for Vietnam on 11 September 2026, just not with those states (HCCH). On 7 October 2026 the HCCH status table showed no objection to Thailand.
How does legalisation work until 28 February 2027?
Legalisation is a chain of stamps in which each one confirms the signature and seal of the one before. The Convention defines it as a consul's certification of the signature, the signer's capacity and the seal (Article 2). Your own country supplies the first stamps, the Thai embassy adds one and Thailand adds the last.
| Country of issue | Steps before the Thai embassy | The Thai embassy |
|---|---|---|
| UK | A notary for a private document, then FCDO legalisation | London legalises documents already legalised by the FCDO (page of 30 April 2026) |
| US | A notary where needed, the Secretary of State of the issuing state, then the US Department of State | Washington legalises only documents bearing the State Department seal and says it does not accept apostilles (page of 24 December 2025) |
| Australia | A notary for a private document, then authentication by DFAT | Canberra legalises documents authenticated by DFAT and says it does not accept apostilles (page undated, checked 7 October 2026) |
After the embassy the document is translated into Thai and, according to ThaiLawOnline (27 September 2026), legalised again at the Thai Ministry of Foreign Affairs in Bangkok. The ministry certifies the signature, the signer's capacity and the seal, not the content. Fees and timing for each step are in the table on Apostille and document legalisation for Thailand.
How are Thai documents legalised for use at home?
A Thai document for use abroad is translated if the recipient needs it, stamped by the Thai Ministry of Foreign Affairs and, where required, legalised by the destination country's embassy in Thailand (ThaiLawOnline, 27 September 2026). The ministry takes appointments through qlegal, and in Phuket the branch at Central Phuket Festival accepts documents.
The UK, the US and Australia are Convention members (since 1965, 1981 and 1995, HCCH). For them the embassy step falls away on 28 February 2027 if they do not object.
What changes on 28 February 2027?
From 28 February 2027, for documents between Thailand and states that did not object to its accession, the only formality that may be required is an apostille from the state of origin (Convention, Article 3). It replaces the foreign-ministry check and the embassy legalisation. In Thailand the Department of Consular Affairs will issue apostilles (HCCH, entry of 1 July 2026).
An apostille is issued at the request of the signer or any bearer, on the document or a separate sheet in a standard form (Articles 4 and 5). At home it comes from your country's competent authority: the FCDO in the UK, DFAT in Australia, and in the US the Secretary of State or the State Department, depending on who issued the document (HCCH list of competent authorities). What stays:
- A Thai translation. An apostille certifies a signature and a seal, not the language (ThaiLawOnline, 30 September 2026).
- The notary step for private papers. A power of attorney or an affidavit first becomes a notarial act and only then gets an apostille (Convention, Article 1).
- The office's own form. A power of attorney for the Land Department still goes on Tor Dor 21 or Or Chor 21 (ThaiLawOnline, 29 September 2026).
- The Probate Court. A UK grant of probate or US letters testamentary has no force in Thailand, and an apostille does not change that: the court issues its own order (ThaiLawOnline, 1 October 2026).
- Consular papers. The Convention does not cover documents executed by diplomatic or consular agents (Article 1), such as an embassy's Certificate of No Impediment (the Australian Embassy in Bangkok issues one).
- Legalisation for states outside the Convention or states that objected.
Document by document: the route before and after
The main difference is the number of stamps. Today a document passes its own foreign ministry and the Thai embassy, and after 28 February 2027 one stamp from the issuing country replaces both. The "after" route applies to a country that did not object, and it is a guide: Thailand has not published rules for its offices.
| Document | Until 28 February 2027 | From 28 February 2027 |
|---|---|---|
| Power of attorney signed at home | Notary, foreign ministry (FCDO, State Department, DFAT), Royal Thai Embassy, Thai translation | Notary, apostille, Thai translation. The Land Department form stays |
| Marriage or birth certificate from the UK, US or Australia | Original or certified copy, foreign-ministry step, Royal Thai Embassy, Thai translation | Apostille from the issuing authority, Thai translation |
| Documents for an estate (death certificate, will, proof of relationship) | Legalisation and a certified Thai translation. The Probate Court appoints the administrator | Apostille and translation. A UK grant of probate or US letters testamentary still has no force |
| Divorce decree granted abroad | Certification, official Thai translation, legalisation at the Thai embassy, registration at the district office | Apostille, translation, registration at the district office |
| Thai marriage certificate for use at home | Translation, Thai ministry stamp (THB 200 or 400), your embassy's step where it asks for one | Apostille from the Department of Consular Affairs if your country does not object; procedure and fee unpublished |
| Embassy-issued affirmation or certificate of no impediment | Handled as the district office requires | Outside the Convention (Article 1); no route announced |
Table sources: the Royal Thai Embassies in London and Washington, ThaiLawOnline (27, 29 and 30 September, 1 October 2026), the Convention text. We confirm marriage and divorce rules with your district office before filing.
What stays uncertain until 30 December 2026 and after?
Three things are unclear: whether any member state will object, how Thailand will issue its own apostilles, and whether offices will accept a document legalised before 28 February 2027. The HCCH table answers the first after 30 December 2026. The others will come with rules from the Thai ministry and the offices themselves.
- Objections. None on 7 October 2026. We check the HCCH table after 30 December 2026.
- Thai apostilles. The HCCH entry has no contact details, fee or e-apostille information, and we found no announcement of which Thai documents and certifications, including those by lawyers certified for notarial services, the Department will apostille.
- Transition rules. As of 7 October 2026 we found no statement on whether offices will accept a document legalised earlier. The Department says 34 organisations confirmed their readiness at a meeting on 18 February 2026 and were due to update their rules by May 2026, but we found nothing published on papers for the Land Department.
The date itself is confirmed: the Department repeated it at regional seminars in Chiang Mai (15 July 2026) and Khon Kaen (26 August 2026).
What to do with your documents now
If your deadline is after 28 February 2027, decide after 30 December 2026, when the objection window closes. If it is earlier, follow the current chain. Either way, ask the receiving office in writing first: its form, translation and validity rules matter more than the apostille.
How we build the chain, how long it takes and what it costs: Apostille and document legalisation for Thailand. On powers of attorney for a deal: Notary public in Phuket. The papers for a condo purchase are in the condo buyer's checklist. A typical situation where a certificate's validity period mattered: DTV refused over a bank statement.
We will update this article after 30 December 2026 and when Thailand publishes its apostille rules. Rules checked on 7 October 2026.
