Notary public in Thailand: who signs off on your document

The form came from your bank back home, or a court, or a land registry. Near the signature line it says "sign in the presence of a notary public." You live in Thailand, so you search for a notary public in Thailand, and every law firm on the first page seems to offer one.

Before you book anyone, it helps to know what that title means here, and who actually decides whether the signature will be accepted.

Is there a notary public in Thailand?

Thai law doesn't create a notary public office. The closest role is the Notarial Services Attorney (in Thai, ทนายความผู้ทำคำรับรองลายมือชื่อและเอกสาร), a Thai lawyer registered with the Lawyers Council of Thailand to certify signatures and documents.

When a Thai firm advertises "notary public" services, this is the role it means.

The title does appear in Thai procedure, pointed outward. The Ministry of Foreign Affairs (MFA) manual on document legalization refers to a notary public when it describes documents made abroad for use in Thailand. That notary is a foreign office, created under foreign law.

What a Notarial Services Attorney is

The role comes from the Lawyers Council Regulation on the Registration of Attorneys who Certify Signatures and Documents B.E. 2551 (2008), issued under the Lawyers Act B.E. 2528 (1985) and published in the Royal Gazette on 8 January 2009. Under that regulation:

• Clause 4 sets four qualifications. The applicant must be a practicing lawyer, must have completed the Lawyers Council's training course on certifying signatures and documents, must not be suspended from practice for professional misconduct, and must be of good character.
• Clause 5 says the Lawyers Council issues a registration certificate with a registration number and an official seal.
• Clause 6 limits the certificate to 2 years. The attorney has to renew it.
• Clause 10 says the Lawyers Council removes an attorney from the role for making a false certification, for losing a qualification, or for letting the certificate lapse.

So the signature and seal on your certification belong to a lawyer the Lawyers Council has registered, under a number it issued, for a term it can end.

Notary public vs Notarial Services Attorney

The last row is the one that matters for your form. The authority that receives your document sets the rule, for both titles.

How to get a notary public signature in Thailand

1. Read the receiving authority's instructions closely. Look for whether a notary in the country where you sign is acceptable, or whether it names your own embassy or consulate. If the form is silent, ask that authority in writing before you sign.
2. Check your own embassy's notarial service. Some embassies in Bangkok notarize documents for their own system. The Embassy of Singapore, for example, witnesses signatures on official Singapore government and court documents, such as a power of attorney, by appointment, and says it generally doesn't notarize documents for use in a country other than Singapore. Each embassy sets its own scope, so check its website.
3. If a Thai Notarial Services Attorney is acceptable, sign in front of the attorney. The attorney then certifies your signature.
4. Ask whether the destination wants another layer of authentication. Some authorities accept the notarized document as it is. Others want legalization as well, or, from 28 February 2027, an Apostille. If they do, confirm with the Department of Consular Affairs how it will handle an attorney-certified document before you rely on that route. Apostille vs Legalization in Thailand: What Changes on 28 February 2027 explains which route applies.
5. Add a translation if the destination needs one. A notarization doesn't translate your document. Certified translation in Thailand: why yours gets sent back covers the format the MFA expects.

Timing at steps 2 and 4 sits with the embassy or the ministry, so we can't promise a turnaround for those steps. Acceptance rests with the receiving authority, and no notary, Thai or foreign, controls that decision.

One rule surprises people: the destination decides, whatever the signer's nationality. A Thai Notarial Services Attorney can generally certify the signature of anyone who signs in Thailand. Japanese authorities don't accept that certification for a foreign national's signature, while French authorities do. So we always start from the country where the document is going. It is advisable to consult a qualified Thai lawyer for your specific situation.

How WPK can help

Our team is made up of several lawyers with more than ten years of experience in cross-border document work.

• Signature certification by a Thai Notarial Services Attorney, after we check the receiving country's stated requirements for your document
• Certified translation in many languages, such as Thai, English, Japanese, Spanish, Korean and Chinese, with every legal translation reviewed by a lawyer before delivery
• Filing for legalization at the Department of Consular Affairs on your behalf under a power of attorney
• Drafting the power of attorney or affidavit itself, in the form the destination asks for. If you're signing a power of attorney for use in Thailand, Power of Attorney in Thailand: What Foreign Nationals Need to Know Before You Sign is the place to start.

We sign an NDA before work starts at no cost, and revise our work free of charge where the error is ours.

Frequently asked questions

Is there a notary public in Thailand?

Thai law doesn't create a notary public office. The closest role is the Notarial Services Attorney, a Thai lawyer registered with the Lawyers Council of Thailand to certify signatures and documents.

Can a Thai lawyer notarize a document for use in the US or UK?

It depends on the authority receiving it. Some accept a signature certified by a notary in the country where you signed. Others want you to go to your own embassy or consulate. Check the instructions that came with the document, or ask the receiving office in writing.

Does a notarized document also need legalization?

Sometimes. Notarization certifies your signature. Legalization is a separate government step that certifies an official signature and seal. Whether you need both is the destination's call, and whether the Department of Consular Affairs will legalize an attorney-certified document is worth confirming with the Department first.

What changes when Thailand joins the Apostille Convention?

From 28 February 2027, an Apostille can replace the embassy step for documents going to other Contracting States, unless that State has objected to Thailand's accession. You'll still need a notarization if the destination asks for one, and how an attorney-certified document moves into the Apostille route is worth confirming before you rely on it.

Conclusion

A notary public in Thailand is, in practice, a Notarial Services Attorney registered with the Lawyers Council. Whether that certification works for your form is decided by the authority receiving it, so read its instructions first and book the signing second.

Send us the form and tell us which country it's going to. We'll tell you which route it needs before you sign anything.