Notary Public or consular legalisation? Choosing the right layer in Thailand
Short answer
A Notary Public in Thailand is a lawyer licensed by the Lawyers Council of Thailand as a Notarial Services Attorney, who certifies signatures and copies. Consular legalisation is a separate step by the Department of Consular Affairs, Ministry of Foreign Affairs, which certifies Thai official seals and translations. Many documents need notarisation first, consular certification second, and endorsement by the destination embassy third.
In everyday speech people say a document has been "certified", but Thai practice recognises at least three distinct acts with different legal effects and different issuing bodies. Choosing the wrong one is the most common reason a correctly prepared file is refused.
The first layer is notarisation. Thailand has no separate notarial profession; the function is performed by a lawyer registered as a Notarial Services Attorney under the Lawyers Council of Thailand regulations. That lawyer attests that the signatory appeared in person, or that a copy matches the original. Notarisation says nothing about whether a foreign authority will accept the content.
The second layer is legalisation by the Legalisation Division, Department of Consular Affairs, Ministry of Foreign Affairs. It verifies that the seal and signature of a Thai authority — or of a notary, or of a translator — are genuine. Almost every Thai official document destined for use abroad passes through this layer.
The third layer is endorsement by the embassy or consulate of the destination country in Bangkok, which certifies the Ministry's seal in turn. Countries such as China, Vietnam and most Middle Eastern states currently require it. Once the Hague Apostille Convention enters into force for Thailand on 28 February 2027, documents travelling to contracting states will need only an Apostille instead of the embassy layer; non-contracting destinations keep the existing chain.
How to judge a provider
1. The notary is named and verifiable
The certifying lawyer must hold a current Notarial Services Attorney licence from the Lawyers Council of Thailand, and the licence number should appear on the certificate. A provider who will not identify the notary before the appointment is a risk.
2. They tell you how many layers your destination needs
A provider who works these files daily answers immediately whether you need notarisation only, notarisation plus consular certification, or the full three-layer chain to an embassy.
3. They file at the Department of Consular Affairs themselves
When an officer asks for wording in a translation to be amended, the translator has to correct and resubmit. Chains of subcontractors turn a one-day correction into a week.
4. They keep per-embassy rules in writing
Each mission in Bangkok sets its own number of copies, forms, translation language and submission days. Generic answers usually mean the provider has not filed there recently.
5. Timelines are quoted in working days per layer
Notarisation is usually same day. Standard consular legalisation normally takes two to three working days, with same-day express at a higher government fee. Embassy queues vary by mission and should be quoted separately.
6. They refuse to certify a signature without the signatory present
Certifying a signature the notary did not witness is improper. A provider offering this is creating a legal exposure that lands on you, not on them.
7. They archive certificate numbers and scans
If the receiving authority queries the file years later, you need the certificate number and date. Providers with a retrieval system can reissue evidence; ad-hoc operators cannot.
Which option fits your case
Notary Public for personal documents
Best for: Powers of attorney, affidavits, certified passport copies, proof of life
Usually completed the same day for documents signed in Thailand.
View this service →Notary Public for corporate documents
Best for: Company affidavits, board resolutions, cross-border contracts
Requires evidence of directors' signing authority and is normally followed by consular certification.
View this service →Certified true copies
Best for: Diplomas, transcripts, identity documents needed in multiple copies
Avoids surrendering originals when several institutions each demand a certified copy.
View this service →Consular legalisation at the MFA
Best for: Thai official documents and translations for use abroad
The mandatory layer before nearly any destination embassy will look at the file.
View this service →Destination embassy legalisation
Best for: China, Vietnam, Gulf states and other non-Hague destinations
Can only be done after the Ministry of Foreign Affairs seal is in place.
View this service →Apostille preparation
Best for: Documents for Hague contracting states from 28 February 2027
Replaces the embassy layer for contracting states; the Thai translation requirement is unchanged.
View this service →
Comparison
| Your situation | Notary | MFA legalisation | Destination embassy |
|---|---|---|---|
| Power of attorney signed in Thailand, used abroad | Required | Required | Required unless the destination is a Hague state after 28 Feb 2027 |
| Thai birth or marriage certificate used abroad | Not applicable | Required, with certified translation | Required for non-Hague destinations |
| Certified copy of a passport for a bank abroad | Required | Usually required | Depends on the receiving bank |
| Company affidavit for a foreign subsidiary | Required | Required | Required for non-Hague destinations |
| Foreign document to be used in Thailand | Handled in the issuing country | Certification of the Thai translation | Royal Thai Embassy endorsement abroad instead |
The correct order of steps
Step 1 — Confirm what the receiving authority actually demands
Ask the recipient in writing whether they require notarisation, legalisation, embassy endorsement or an Apostille. Requirements differ between a court, a university and a bank in the same country.
Step 2 — Prepare the original and the translation together
The Ministry certifies a translation against the sealed original, so both must be consistent in names, dates and document numbers.
Step 3 — Notarise where a signature or copy is involved
Bring your passport and attend in person. Corporate files also need current company registration evidence showing signing authority.
Step 4 — File for consular legalisation
Choose standard or express service according to your deadline, and keep the receipt: it carries the reference used for any follow-up.
Step 5 — Submit to the destination embassy if required
Check the mission's submission days and required number of copies before travelling to Bangkok for the appointment.
Mistakes that cause rejection
✕ Assuming a notarised document is ready for use abroad
✓ Notarisation is domestic. Foreign authorities look for the Ministry of Foreign Affairs seal, and often an embassy endorsement on top of it.
✕ Translating after the consular appointment
✓ The translation is what gets certified. Prepare it before filing, not afterwards.
✕ Submitting a photocopy where an original is required
✓ Confirm in advance whether the office accepts a certified copy; many require the original issued document.
✕ Treating Apostille as already available in Thailand
✓ The Convention enters into force for Thailand on 28 February 2027. Until then, embassy legalisation remains the route.
✕ Letting the signatory sign in advance
✓ The notary must witness the signature. A pre-signed document has to be re-executed.
Frequently asked questions
Is a Notary Public in Thailand the same as in the United States?
No. Thailand has no separate notarial profession. The function is carried out by a lawyer registered as a Notarial Services Attorney with the Lawyers Council of Thailand, and the scope is certification of signatures, copies and certain declarations.
Do I always need consular legalisation after notarisation?
Only when the document leaves Thailand or when the receiving authority explicitly demands the Ministry of Foreign Affairs seal. Documents used purely inside Thailand normally stop at notarisation.
How long does consular legalisation take?
Standard service is normally two to three working days. Same-day express exists at a higher government fee. Embassy endorsement afterwards depends on the individual mission's queue.
What changes when the Apostille Convention takes effect?
From 28 February 2027, a single Apostille replaces the embassy endorsement for documents exchanged with other contracting states. Documents for non-contracting states continue through the existing legalisation chain.
Can a signature be notarised remotely?
The signatory must appear before the notarial services attorney. Where the person cannot travel, the usual solution is executing the document before a Royal Thai Embassy abroad instead.
How do I get a quotation?
Send scans of the documents and tell us the destination country and deadline by phone, LINE or email. Fees depend on the number of layers, document type and whether express service is used.
Talk to us before you file
Phone 083-249-4999 · Translation desk 081-562-0444 · LINE @NYC168 · contact@ilc.ltd
General information reviewed at the date shown on this site. It is not legal advice for an individual case, and approval always remains at the discretion of the reviewing authority.