Using Thai documents abroad or foreign documents in Thailand usually requires a multi-step legalisation chain: notarisation or issuance by the source authority, legalisation at the Consular Affairs Department of the Ministry of Foreign Affairs, and finally attestation at the destination country's embassy or consulate in Bangkok. Thailand acceded to the Apostille Convention on 30 June 2026, and the Convention enters into force for Thailand on 28 February 2027. Until that date, full consular legalisation remains the only available route.
Last reviewed: 2026-10-10 · General information only, not legal advice for your specific case
What Embassy Attestation Means
Embassy attestation (consular legalisation) is the process by which the destination country's embassy or consulate verifies and stamps a document that has already been legalised by the Ministry of Foreign Affairs of the issuing country, confirming that the consular officer's signature and seal are genuine so the document can be accepted by authorities in the destination country.
This step does not certify the content of the document — it certifies the chain of signatures and seals. The document must therefore be correct from the source; an embassy stamp does not cure errors in content or translation.
The Typical Legalisation Chain
1. Prepare the original document
Thai civil documents such as birth and marriage certificates must be originals or copies issued by the owning authority. Private documents such as powers of attorney usually must be signed before a Notary Public first.
2. Translate if required
If the destination country does not accept Thai-language documents, a certified translation is needed. Some embassies require translation before MFA legalisation.
3. Legalise at the Consular Affairs Department
Submit the document to the Department of Consular Affairs, Ministry of Foreign Affairs, to legalise the signature and seal of the issuing authority or Notary Public.
4. Attest at the destination embassy
Take the MFA-legalised document to the destination country's embassy or consulate in Bangkok with that embassy's form and fee.
5. Collect and use the document
Check the stamps and details before use. Some countries limit the validity of an attestation, for example to three or six months.
Every Embassy Sets Its Own Rules
There is no common standard for embassy attestation. Each embassy sets its own forms, fees, appointment system, turnaround time and translation requirements. Some accept only translations into their official language, some require online appointments, and some decline certain document types entirely.
Always check the latest requirements on the destination embassy's own website before filing, because conditions change without notice. Our staff track the requirements of the major embassies in Bangkok and prepare documents correctly the first time.
- Middle Eastern embassies often require Arabic translation and additional steps
- Many European embassies accept English documents, but some require their official language
- China and Vietnam have specific document format and appointment rules
- Some countries have no embassy in Thailand — attestation must go through a third country
How This Differs from Apostille — and Thailand's Timeline
An Apostille is a single-form certificate under the 1961 Hague Convention that replaces the multi-step legalisation chain between member states. Thailand acceded to the Convention on 30 June 2026, and it enters into force for Thailand on 28 February 2027, according to the HCCH and the Ministry of Foreign Affairs.
Until the Convention takes effect, Thai documents for use abroad and foreign documents for use in Thailand must still go through full consular legalisation, including the embassy step. Even afterwards, countries that are not parties to the Convention will continue to require embassy attestation.
Documents Commonly Attested at Embassies
Each document type has different source requirements — educational documents for some countries must first be certified by the Ministry of Education, while corporate documents must be issued by the Department of Business Development within the period the embassy specifies. Mapping the correct route from the start avoids repeat filings.
- Birth certificates, marriage certificates, death certificates and civil registration documents
- Educational certificates, transcripts and diplomas
- Powers of attorney and contracts signed before a Notary Public
- Corporate documents such as company affidavits and shareholder lists
- Criminal record checks and medical certificates
Timing and document validity planning
Many document types have limited validity at the destination — criminal record checks or educational certificates for some countries are accepted only if issued within the last three to six months. Starting the legalisation chain too early can leave documents expired before filing; starting too late can miss embassy deadlines. Planning backwards from the date the document is needed is essential.
During holiday seasons or the destination country's public holidays, embassies often close or have especially long appointment queues. Allow several weeks for the full legalisation chain, particularly for documents passing through multiple authorities.
Foreign documents for use in Thailand
The legalisation chain runs in both directions. Documents issued abroad — birth certificates, marriage certificates or powers of attorney — for use with Thai authorities must be legalised at the issuing country's foreign ministry, then at the Thai embassy in that country, then translated into Thai with the translation certified at the Department of Consular Affairs in Thailand.
Individual Thai authorities have additional requirements; a district office accepting a marriage registration, for example, may require translations certified in a specific format. Checking the Thai receiving authority's requirements before starting legalisation abroad avoids costly rework from overseas.
How Embassy Requirements Differ
Each embassy in Bangkok has its own attestation rules: intake hours, advance appointment systems, accepted translation languages and payment methods. Some accept only documents legalised by the Department of Consular Affairs within a set period.
For countries with no embassy in Bangkok, documents may need to be sent to an embassy in a third country, adding time and complexity. Checking the embassy's current requirements directly before proceeding is essential.
Why documents get rejected and how to prevent it
The most common cause is a name or spelling that does not match the passport, even by a single letter. Next come expired documents — many recipients accept a certificate of no marriage or a police clearance only if issued within the last three or six months — and translations by translators the embassy does not accept. Checking that every document matches the passport exactly before starting is the cheapest prevention.
Another cause is doing steps in the wrong order, such as going to the embassy before the Department of Consular Affairs, or submitting a copy where the original is required. A rejection usually means starting over and paying government fees again. Having a specialist map the legalisation route for each document before filing greatly reduces this risk.
Frequently asked questions
Must documents always be legalised at the MFA before the embassy?
Generally yes — most embassies attest only documents already legalised by the Department of Consular Affairs. There are exceptions for some countries, so check the destination embassy's requirements every time.
How long does embassy attestation take?
It varies widely between embassies, from same-day collection to several weeks, and some require advance appointments. Our staff will advise the current timeframe for the relevant embassy before proceeding.
Can Thai-language documents be filed directly, or must they be translated first?
It depends on the embassy. Many require an English or official-language translation alongside the original, and some require translation by a translator the embassy recognises.
Once Thailand uses Apostille, is embassy attestation still needed?
The Apostille Convention takes effect for Thailand on 28 February 2027. After that, documents between Thailand and member states use a single Apostille, but non-member countries still require embassy attestation as before.
How are embassy fees calculated?
Each embassy sets and publishes its own fees on its website. MFA legalisation fees are published by the Ministry of Foreign Affairs. For our service fees, please request a quotation from our staff.
What if the destination country has no embassy in Thailand?
You must identify which country hosts that nation's accredited embassy (for example Singapore, Malaysia or India) and plan cross-border attestation, which adds steps and time. Our staff can map the route case by case.
Official sources
Related services
Start by sending the basics
Tell us about your situation and what you need checked. We will reply with the documents and steps that apply to your case.
Contact the team