Notary vs Certified Translation vs MFA Legalization

A notary is not a translator. A translator is not a legalizer. If you have a foreign document you need a Thai authority to accept, you may need one of these three services, two of them, or all three, and agencies selling the bundle rarely explain which part actually does what. Here is the plain version, for documents coming into Thailand rather than going out.

The three services, in one table

Thailand has no conventional “notary public.” A Notarial Services Attorney fills that role: extra training overseen by the Lawyers Council, then accreditation to certify signatures, certify true copies of passports and IDs, record sworn affidavits, and notarize documents like a Power of Attorney. None of that involves translation, and none of it involves the Ministry of Foreign Affairs.

Myth vs fact

• Myth: A notary can also certify my translation is accurate. Fact: A Notarial Services Attorney certifies signatures and copies, not translation quality; that is a separate professional’s job.
• Myth: MFA legalization checks that a document’s contents are true. Fact: The Legalization Division verifies whose seal or signature is on the page, not the underlying facts.
• Myth: Any translation is fine as long as it’s accurate. Fact: Some Thai authorities require the translation to carry an official endorsement before they’ll accept it, which means certified translation plus MFA legalization, not translation alone.
• Myth: One agency visit gets you everything, always. Fact: It can, but you’re paying for coordination across three separate legal steps, not one service; knowing which steps you actually need controls the price.

What a foreign document coming into Thailand usually needs

Work through it in order:

1. Is the document already authenticated at its source? A foreign civil document (birth certificate, marriage certificate, degree) generally needs authentication in the country that issued it, through that country’s own chain plus the Thai embassy or consulate there, before it reaches Thailand. The Thai MFA does not authenticate a foreign government’s own documents; it only endorses Thai-side seals.
2. Is it in Thai? If not, get a certified translation from a licensed or professional translator.
3. Does the receiving Thai authority require the translation to carry official weight? If yes, take the certified translation to the MFA’s Legalization Division, which verifies the translator’s seal and gives the Thai-language version formal recognition.
4. Do you need to sign something in Thailand, or certify a copy of your own passport, for use here or abroad? That’s a Notarial Services Attorney’s job, separate from steps 1-3.

Which situation are you in?

The same three services apply across very different reasons for needing them. A few common ones:

Two patterns repeat across all five: a document’s own origin gets authenticated where it was issued, not in Thailand, and MFA legalization only ever endorses a Thai-side seal, never a foreign one.

Documents to bring, whichever service you use

• Your passport, and the original of whatever you’re getting certified or translated
• A photocopy of the document, since most offices keep one
• For MFA legalization: your appointment confirmation, since walk-ins without one are commonly turned away
• For a Notarial Services Attorney: proof of the underlying transaction if you’re signing a Power of Attorney (property details, the receiving party’s information)
• Cash in Thai baht for the fee; card acceptance varies by provider

Where and when for MFA legalization

The Legalization Division sits on the 3rd floor of the Department of Consular Affairs, 123 Chaeng Watthana Road, Bangkok 10210, open 08:30-14:30, closed Saturday, Sunday and public holidays. An online appointment is required before you go; walking in without one risks being turned away. Reported fees run 200 THB (~6 USD) for regular service or 400 THB (~12 USD) for express, per document, plus a separate 200 THB (~6 USD) translation-check fee where a translation is being endorsed, so a single document with a translation typically runs 400-600 THB (~12-18 USD), checked September 2026.

Where this fits with your other paperwork

Notarization, translation and legalization rarely stand alone. If the document you’re authenticating supports a visa or extension application, confirm your underlying stay basis first: see Thailand Visa Exemption vs Tourist Visa for how entries and extensions work, the DTV visa guide for the Destination Thailand Visa’s own document set, and 90-Day Reporting and TM30 in Thailand Explained for the ongoing address duties that follow once you’re settled. None of those three replace the notarization or legalization chain above; they’re separate duties that often need the same folder of paperwork on the same visit. Applicants assembling a Thailand permanent residence file often need several documents carried through this same chain.

Common questions

Can a Notarial Services Attorney also translate my document?

Some individual NSAs also work as translators, but the two roles are legally separate. Check specifically whether the person in front of you is certifying your signature, certifying your translation’s accuracy, or both, rather than assuming one covers the other.

Does MFA legalization make a foreign document valid in Thailand?

It gives a Thai-side translation or notarized document official recognition by verifying whose seal is on it. It does not authenticate a foreign country’s own civil documents; that step happens in the issuing country before the document reaches Thailand.

What’s changing with the Apostille Convention?

How is this different from legalizing a Thai document for use abroad?

This article covers a foreign document you need a Thai authority to accept. Sending a Thai document abroad runs a mirrored but distinct chain, covered in legalizing a Thai document for use abroad (Thai notarization, then MFA legalization, then often the destination country’s embassy), which the police clearance certificate process also touches: see Getting a Police Clearance Certificate From Thailand for one concrete example of a Thai-issued document that sometimes needs exactly that outbound chain. Related guides: US Embassy Bangkok guide, Japanese Embassy Bangkok guide, Philippine Embassy Bangkok guide.

Last verified: September 2026.