Until 28 February 2027 a document for a Thai office goes through a full chain: certification in the country of issue, authentication by that country's foreign ministry, legalisation by the Thai embassy, a Thai translation and a stamp from the Thai Ministry of Foreign Affairs. From 28 February 2027 an apostille replaces two of those steps, the foreign-ministry check and the embassy legalisation, for states that do not object to Thailand's accession. We build the route for your document and the office that will read it. Rules are as of 7 October 2026.
In short
- Thailand deposited its instrument of accession to the Apostille Convention on 30 June 2026. The Convention enters into force for Thailand on 28 February 2027 (HCCH, 7 October 2026).
- Existing members can object until about 30 December 2026, and a state that objects stays on legalisation with Thailand (Convention, Article 12). The HCCH status table shows no objection on 7 October 2026.
- The UK, the US and Australia are members (since 1965, 1981 and 1995), yet their documents need the old chain until 28 February 2027: the embassies in Washington and Canberra say they do not accept apostilles.
- An apostille certifies the signature, the signer's capacity and the seal, not the content. A Thai translation and the receiving office's own rules remain (Convention, Article 5; ThaiLawOnline, 30 September 2026).
- Thailand has not published the procedure, fee or timing for apostilles on Thai documents (HCCH, 1 July 2026).
What we do with your documents
We find out where the document will be used and what that office accepts, choose the route, run certification, translation and legalisation, and check the set before filing. You send scans and the purpose. Within 24 hours you get a route with the steps, the timing and the fees.
- Office. We ask the receiving office (Land Department, district office, court) whether it wants the original, a certified copy or a translation.
- Route. We decide which steps you need now and which fall away after 28 February 2027.
- Country of issue. We list the steps for your country: the FCDO in the UK, the Secretary of State and the State Department in the US, DFAT in Australia.
- Translation and Thai ministry. We translate into Thai and file the legalisation at the Thai Ministry of Foreign Affairs, which has a branch at Central Phuket Festival and takes appointments through qlegal (ThaiLawOnline, 27 September 2026).
- Check. We compare names, dates, validity and the order of stamps before filing.
Which documents do we handle?
We handle documents for five tasks: a property deal, a marriage, a divorce, an estate and a Thai document for use abroad. Each office asks for its own set, so we confirm the requirements first and build the chain second.
| Task | Documents | What the sources say |
|---|---|---|
| Property deal | Power of attorney, affidavits, certificates from home | Legalisation and a Thai translation; the Land Department wants Tor Dor 21 or Or Chor 21 for a power of attorney. See notary public and powers of attorney |
| Marriage | Proof you are free to marry (embassy affirmation or certificate of no impediment), passport | Thai translation and legalisation of the foreign documents, then registration at the district office |
| Divorce granted abroad | Decree or certificate | Certification, official Thai translation and legalisation at the Thai embassy, then registration at the district office |
| Estate | Death certificate, will, proof of relationship | Legalisation and a certified Thai translation (ThaiLawOnline, 1 October 2026) |
| Thai document for use abroad | Marriage certificate, police certificate, court order | Thai Ministry of Foreign Affairs stamp, then the destination country's embassy step where needed |
Table sources: ThaiLawOnline and Thailand Privilege (2026). Two cases need extra care. A UK grant of probate or US letters testamentary has no force in Thailand, because the Probate Court issues its own order (ThaiLawOnline, 1 October 2026). An embassy's own certificate, such as the Certificate of No Impediment from the Australian Embassy in Bangkok (checked 7 October 2026), is a consular document, and the Convention does not cover those (Article 1). We ask the district office how it is handled.
How long does it take and what does it cost?
The timing is the sum of the offices. A UK document needs FCDO legalisation, 3 working days at the Royal Thai Embassy in London, then a translation and 2 working days at the Thai ministry. In Washington the embassy alone quotes up to 21 business days. As a guide we plan 2 to 6 weeks, with a margin for appointments and post.
| Step | Time | Fee | Source |
|---|---|---|---|
| Royal Thai Embassy London | 3 working days | GBP 10 per document | Embassy page, 30 April 2026 |
| Royal Thai Embassy Washington | Up to 21 business days | USD 15 per seal | Embassy page, 24 December 2025 |
| Royal Thai Embassy Canberra | Not stated | AUD 25 per seal | Embassy page, checked 7 October 2026 |
| Thai Ministry of Foreign Affairs, standard | 2 working days | THB 200 per stamp | ThaiLawOnline, 27 September 2026 |
| Thai Ministry of Foreign Affairs, express | Same day | THB 400 per stamp | ThaiLawOnline, 27 September 2026 |
Your notary, foreign ministry and translator charge their own fees; we agree the estimate before work starts, and government fees are paid separately. After 28 February 2027 the chain gets shorter for states that do not object.
Start now or wait for the apostille?
If an office needs your document before the end of February 2027, start the chain now: apostilles will not work yet. If the deadline is later, an apostille replaces two steps, but that depends on whether your country objects and on transition rules that we could not find in any source.
| When the office needs it | What we do |
|---|---|
| Before 28 February 2027 | Full chain. We check how long each paper stays valid |
| After 28 February 2027, your country has not objected | Apostille instead of the ministry and embassy steps; the Thai translation stays |
| After 28 February 2027, your country objected | The full chain stays. We check the HCCH table after 30 December 2026 |
| Legalised before 28 February 2027, needed later | We found no published transition rules; we ask the office in writing before filing |
What can go wrong?
An office can send a document back if the stamps are in the wrong order, there is no translation, a name is spelled two ways, or the paper is too old. Each stamp checks the one before it, so a missing or extra step means a return and a new wait.
- A stamp from the wrong body or in the wrong order. Washington legalises only documents bearing the US Department of State seal, Canberra only those authenticated by DFAT.
- A name spelled differently in the passport, the document and the translation.
- An expired paper. For a DTV the London embassy asks for a police certificate issued within six months; a typical situation is DTV refused over a bank statement.
- A plan that counts on an apostille before 28 February 2027.
What to check yourself before you contact us
- Who needs the document and in what form: original, certified copy or translation.
- When it was issued, which country issued it and when it is needed in Thailand.
- Whether your name and date of birth match in every document and in the passport.
Describe your situation in the form below: which document, where it was issued, where it will go and by what date. Within 24 hours we send a route: the steps you need now, what falls away after 28 February 2027 and how long it takes.
