Licensed by the Lawyers Council of Thailand

Signature Authentication by Notarial Services Attorney

Powers of attorney, contracts, consent letters, and overseas application forms — certified by attorneys licensed by the Lawyers Council of Thailand.

4.9/5

(6,168 reviews)

094-895-8999 LINE @Thainotary

Signature Authentication by Notarial Services Attorney

Starting fee

THB 1,500/set

Time per document

30 minutes

License

Lawyers Council

Coverage

77 provinces

Licensed Notarial Services Attorneys · Lawyers Council of Thailand

Our Team of 6 Licensed Notary Public Attorneys

Signature authentication by a Notary Public is the act of a licensed attorney verifying that ‘the person who signed the document is genuinely that person, and signed in the attorney's presence willingly.’ It is required for documents used abroad — such as Powers of Attorney, international business contracts, parental consent letters, and foreign application forms requiring in-person notary witnessing.

Starting fee: THB 1,500/set — Provided by Thai Notary Law & Service Co., Ltd., DBD Reg. 0405565001923, Thailand.

How to use Signature Authentication by Notarial Services Attorney

1
Contact us via LINE @Thainotary or call +66 94-895-8999 to describe the document.
2
Send a photo/scan in advance so our attorney can review and quote.
3
Book an appointment — at our office, on-site, or online via Zoom.
4
Prepare original documents and ID/passport per the checklist below.
5
Sign in front of the attorney and receive the notarized document the same day.

Which documents need signature authentication?

The most common documents requiring signature authentication include: powers of attorney for foreign litigation, parental consent letters for minors traveling abroad with one parent, international real-estate sale agreements, joint venture agreements, inheritance consent letters, and study or employment application forms that must be signed in front of a Notary as required by foreign institutions or employers.

We also handle overseas medical consent letters, foreign pension proxy authorizations, foreign bank loan acceptance letters, and documents related to incorporating companies in special economic zones such as Hong Kong, Singapore, Delaware, and the BVI.

Our signature authentication process

Step 1: Send the draft to us for review. The attorney checks whether the wording matches the intended overseas use and recommends edits to meet international Notary standards. Step 2: Book an in-office appointment, or request an on-site visit anywhere in Bangkok and the surrounding provinces.

Step 3: The attorney verifies the signer's ID/passport, then witnesses the signature. Step 4: The attorney affixes duty stamps, signs, applies the Notary seal, records the act in the Logbook, and assigns a certification number. Step 5 (optional): Forward to MFA and the destination embassy for full international validity.

The strictness that makes your documents accepted worldwide

Notarial Services Attorneys are professionally bound to verify four things: (1) the signer's identity, (2) willingness to sign, (3) understanding of the document's contents, and (4) legal capacity (not under duress, intoxication, or incapacity).

If even one issue is detected, the attorney must refuse certification on the spot. This rigor is precisely why foreign embassies and institutions trust Thai Notary documents — it is verification, not just stamping.

Coverage in Bangkok and surrounding provinces

Our attorneys provide on-site service across all 50 Bangkok districts, with focus on the key business zones — Silom, Sathorn, Asok, Ploenchit, Chidlom, Phrom Phong, Thonglor, Ekkamai, Phra Khanong, Rama 9, Ratchada, Lat Phrao, Huai Khwang, Watthana, Khlong Toei, Bang Rak, and Pathum Wan — plus Ratchaprasong, Siam, and along the entire BTS Sukhumvit/Silom lines, MRT Blue/Purple/Yellow lines, and the Airport Rail Link.

For surrounding provinces (Nonthaburi, Pathum Thani, Samut Prakan, Samut Sakhon, Nakhon Pathom) we travel to clients by appointment and can meet at nearby malls — CentralPlaza WestGate, CentralPlaza EastVille, Mega Bangna, CentralPlaza Rama 2, and Future Park Rangsit.

Why choose us

We are a registered company (DBD No. 0405565001923) operated by genuinely licensed Notarial Services Attorneys whose license numbers can be verified with the Lawyers Council of Thailand. We hold a 4.9/5.0 satisfaction rating from 6,168 client reviews and have served Thai and international clients globally for over 12 years.

Real notarized samples

Real client samples

Sample of attorney-witnessed signature notarization

Common documents handled

Power of Attorney for foreign litigation counsel
Parental consent for minors traveling abroad
International real-estate purchase agreement
Foreign bank loan acceptance letter
Incorporation documents for Singapore / Hong Kong / BVI

Before your appointment

Original Thai national ID card or Passport of the signer
Original document plus copies (for true-copy certification)
Do NOT sign in advance — signature must be made in front of the attorney
For companies: company affidavit no older than 30 days, with company seal

Service fee:1,500–5,000 THB

FAQ

Frequently asked questions

Is a Thai Notary Public different from a foreign Notary Public?

In Thailand, the Notary Public role is performed by ‘Notarial Services Attorneys’ licensed by the Lawyers Council of Thailand. Their certifications are valid abroad once further attested by the MFA Department of Consular Affairs and the destination embassy.

How long does the process take?

Typically 30–60 minutes per document set when booked in advance. MFA legalization adds 1–3 working days.

Can the notarized document be used abroad immediately?

Most overseas use requires three steps: (1) Notary by attorney (2) MFA legalization (3) Destination embassy attestation. We handle all three.

What is the starting fee, and are there additional costs?

Notary by attorney starts at THB 1,500 per document set. MFA legalization adds THB 200–800 government fee and THB 2,500–5,000 service fee per applicant for filing.

How can clients outside Bangkok or abroad use this service?

We deliver nationwide and worldwide. Domestic clients can ship documents by post; international clients can use international courier, with video-verified identity where permitted by law.

Where in Bangkok can I use the signature authentication service?

We cover all 50 Bangkok districts including Silom, Sathorn, Asok, Phrom Phong, Thonglor, Ekkamai, Rama 9, Ratchada, Lat Phrao, and every BTS/MRT/ARL station, with on-site visits available.

Authoritative Sources

Notarial Services Attorney Regulation B.E. 2546 (2003) — Lawyers Council of Thailand
Civil and Commercial Code — Notarization — Office of the Council of State, Thailand
Hague Apostille Convention 1961 — Thailand accession (deposited 30 June 2026; entry into force 28 February 2027) — Hague Conference on Private International Law (HCCH)

Service Provider Information

Legal name: Thai Notary Law & Service Co., Ltd.
DBD Reg. No.: 0405565001923
Established: 2009
Regulator: Lawyers Council of Thailand
Area served: Thailand + Worldwide (online)
Languages: TH · EN · ZH · JA · KO · DE · FR · ES · +30
Hours: Mon–Sun 09:00–21:00
Rating: 4.9/5 (6,168)

Verified license

Registered DBD No. 0405565001923

Available

Mo-Fr 09:00-18:00

Coverage

77 provinces + 50 BKK districts + worldwide online

Related services

Notary Public Overview

Certified Translation

Quick answer (40-second read)

Signature notarization is when a Notarial Services Attorney witnesses you sign, verifies your ID/passport, applies the seal and issues a notarial certificate. Used for POAs, contracts, foreign bank forms and embassy submissions. From THB 1,500, completed same day — Thai law requires signing in front of the attorney.

Key facts

Turnaround

30 min at office

Fee from

THB 1,500 / doc

Accepted by

MFA + 190+ embassies

Validity

No expiry (most embassies 3–6 mo)

Pricing & turnaround

Fee from	THB	Turnaround
Standard signature, 1 doc	1,500	Same day
Bundle 2–5 docs	2,500	Same day
Rush 2 h + after hours	3,500	Rush 2 h
Attorney travels to client (BKK)	4,500	Same day

Step-by-step

1
Send draft
Send PDF/photo via LINE @nyc.notary or email — free review, reply within 15 min.
2
Book appointment
Pick office, on-site or Zoom (where destination law allows).
3
Sign in front of attorney
Bring original passport/ID — do NOT pre-sign — attorney verifies and logs the act in the notarial register.
4
Issue + forward MFA
Receive notarial certificate + seal — optionally route to MFA + destination embassy.

Service-specific FAQ

Must I really sign in front of the attorney?

Yes — the 2003 Lawyers Council regulation requires the signatory to appear in person. A pre-signed document voids the notarial certificate and is commonly rejected by embassies.

Can it be done via Zoom?

Only where destination law permits (e.g. some US states) — we record the session, capture ID and issue a Remote Online Notarization certificate.

What does the THB 1,500 fee cover?

Attorney fee + seal + 1 certificate set + entry in Lawyers Council notarial register. Excludes MFA (THB 800–1,500) and embassy fees billed separately.

In which countries is it recognised?

Worldwide once chained through MFA + destination embassy. For the 126 Apostille states (effective from 28 Feb 2027), an Apostille replaces the embassy step.

Does the notarial certificate expire?

The notary act itself does not expire, but most embassies and banks accept only documents issued within 3–6 months — notarise close to submission.

Documents we notarize here

Loan / Guarantee Agreement

Related services

Legal references

Lawyers Council of Thailand — Notarial Services Attorney licence issued by the Lawyers Council of Thailand under Royal Patronage. [ref]
Civil and Commercial Code of Thailand — Civil & Commercial Code §§ 9 and 798 — signature acknowledgement and powers of attorney. [ref]
Ministry of Foreign Affairs (Thailand) — Notarised documents are further authenticated by the MFA Department of Consular Affairs before embassy submission. [ref]

Supplemental Q&A from the 2026 SEO brief (this service)

What can a Notary Public in Thailand actually do?

In Thailand the role is called Notarial Services Attorney. It covers (1) signature attestation, (2) certified true copies, (3) affidavits and oaths, (4) existence of documents, (5) certified translations, and (6) corporate documents such as POAs, meeting minutes and company affidavits — all for overseas use.

Why can Thai lawyers act as 'Notary Public' when Thailand is a civil-law jurisdiction?

The Lawyers Council of Thailand's 2008 regulation on 'Notarial Services Attorneys' allows accredited lawyers who complete the special course and register to perform Notary-equivalent acts. Their seal and signature are accepted overseas after MFA + embassy legalization, or via Apostille from 28 Feb 2027.

How long does notarization take?

The notarization itself takes 15-30 minutes in-person and can be completed same-day. Adding MFA + embassy legalization takes 3-7 more business days; the Apostille route takes 1-2 business days for Hague Convention member states.

How much does a Notary Public cost?

Starting rates: CTC ฿800/set, signature attestation ฿1,500-2,500, POA/Affidavit ฿2,000-3,000, full corporate packs from ฿3,000. Mobile-visit fees added by distance; MFA fees are separate.

What do I need for Power-of-Attorney (POA) notarization?

Bring (1) an UNSIGNED draft POA — you must sign in front of the attorney; (2) original passport or Thai ID; (3) attorney-in-fact details; (4) referenced supporting documents (land title, company affidavit). English POAs need a Thai translation if used in Thailand.

Does a foreigner's Will in Thailand need Notary certification?

A Will executed in Thailand under Civil Code §§1655-1672 needs only two witnesses — Notary is not required. But if the Will must be used abroad (e.g. to administer estate in the home country), we recommend Notary + MFA + embassy legalization for smoother acceptance.

How is a Certificate of Single Status notarized?

Thais: obtain from your district office → certified translation → MFA → foreign spouse's embassy. Foreigners: sign an Affidavit of Single Status before a Thai attorney or your embassy → MFA → present at Thai district office to marry.

What corporate documents are needed to open an account or register abroad?

Standard pack: (1) DBD company affidavit ≤30 days, (2) BOJ 5 shareholder list, (3) MOA, (4) meeting minutes authorising the transaction, (5) POA to the overseas signer, (6) directors' passports. All notarized → MFA → destination embassy (or Apostille).

What should an expat in Thailand bring for notarization?

(1) Original passport + current-visa page copy; (2) proof of Thai address (lease or utility bill); (3) original documents to notarize; (4) certified translation first if the document is not in English/Thai; (5) tell us the destination country so we can advise the correct chain (Apostille vs. embassy).

Get started today

Send your document or get a quote — we reply within 1 working hour.

094-895-8999 LINE @Thainotary

Real customer questions, answered by our attorneys

Selected from our knowledge base of 3,300+ real questions we have answered.

Are international maritime safety training certificates subject to MFA review?

Consular / Apostille

Per the Legalization Division, Department of Consular Affairs (MFA Thailand) to "Are international maritime safety training certificates subject to MFA review?" — Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Government fee is THB 200 per stamp for the normal service (2–3 business days) and THB 400 per stamp for same-day express (file before 11:30). Our end-to-end agency fee starts at THB 1,500–4,500 per set depending on volume and urgency. Free consultation on LINE @Thainotary or call 094-895-8999 (Mon–Sun 08:00–20:00 ICT).

What administrative remedies exist if a foreign embassy refuses document attestation?

Consular / Apostille

Per the Legalization Division, Department of Consular Affairs (MFA Thailand) to "What administrative remedies exist if a foreign embassy refuses document attestation?" — Standard outbound chain: original from the issuing Thai authority → certified English translation → MFA certification of the translation/signature → destination-embassy legalisation in Bangkok (only for non-Apostille countries). Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Send a photo of the document to LINE @Thainotary and we will quote the chain, cost and timeline within 15 minutes.

Related service: Embassy legalisation

How are foreign forensic science and DNA testing laboratory accreditation files legalized?

Consular / Apostille

Practitioner's view to "How are foreign forensic science and DNA testing laboratory accreditation files legalized?" — Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Government fee is THB 200 per stamp for the normal service (2–3 business days) and THB 400 per stamp for same-day express (file before 11:30). Our end-to-end agency fee starts at THB 1,500–4,500 per set depending on volume and urgency. Send a photo of the document to LINE @Thainotary and we will quote the chain, cost and timeline within 15 minutes.

What verification rules apply to foreign smart city development and IoT infrastructure contracts?

Consular / Apostille

How we handle this in practice to "What verification rules apply to foreign smart city development and IoT infrastructure contracts?" — Standard outbound chain: original from the issuing Thai authority → certified English translation → MFA certification of the translation/signature → destination-embassy legalisation in Bangkok (only for non-Apostille countries). Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Send a photo of the document to LINE @Thainotary and we will quote the chain, cost and timeline within 15 minutes.

Related service: Embassy legalisation

Are NAATI certified translations accepted alongside Thai consular legalization?

Consular / Apostille

Quick summary for expats, HR and law firms to "Are NAATI certified translations accepted alongside Thai consular legalization?" — Standard outbound chain: original from the issuing Thai authority → certified English translation → MFA certification of the translation/signature → destination-embassy legalisation in Bangkok (only for non-Apostille countries). Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Free consultation on LINE @Thainotary or call 094-895-8999 (Mon–Sun 08:00–20:00 ICT).

Related service: Embassy legalisation

Does the Department of Consular Affairs in Chaeng Watthana directly legalize foreign-issued documents?

Consular / Apostille

How we handle this in practice to "Does the Department of Consular Affairs in Chaeng Watthana directly legalize foreign-issued documents?" — Standard outbound chain: original from the issuing Thai authority → certified English translation → MFA certification of the translation/signature → destination-embassy legalisation in Bangkok (only for non-Apostille countries). Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Free consultation on LINE @Thainotary or call 094-895-8999 (Mon–Sun 08:00–20:00 ICT).

Must international commercial invoices and shipping documents undergo MFA legalization?

Consular / Apostille

How we handle this in practice to "Must international commercial invoices and shipping documents undergo MFA legalization?" — Standard outbound chain: original from the issuing Thai authority → certified English translation → MFA certification of the translation/signature → destination-embassy legalisation in Bangkok (only for non-Apostille countries). Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Free consultation on LINE @Thainotary or call 094-895-8999 (Mon–Sun 08:00–20:00 ICT).

Related service: Embassy legalisation

Must academic records from private universities or international schools be verified by MHESI prior to MFA submission?

Consular / Apostille

How we handle this in practice to "Must academic records from private universities or international schools be verified by MHESI prior to MFA submission?" — Typical documents: house registration, birth/marriage/divorce certificates, name-change records, death certificates, single-status letters, police clearance, degrees and transcripts, company affidavits, VAT Por.Por.20, financial statements, powers of attorney and cross-border contracts. Government fee is THB 200 per stamp for the normal service (2–3 business days) and THB 400 per stamp for same-day express (file before 11:30). Our end-to-end agency fee starts at THB 1,500–4,500 per set depending on volume and urgency. Send a photo of the document to LINE @Thainotary and we will quote the chain, cost and timeline within 15 minutes.

Related service: NAATI translation

Browse all 3,300+ questions Consular / Apostille

Key facts at a glance — Notary Public certification

Indicative price: From THB 800–3,000 per document set
Turnaround: Typically 1–2 business days (same-day rush available)
What you receive: Signed and sealed by a Thai Lawyers Council–registered Notarial Services Attorney
Service coverage: Nationwide Thailand — courier and fully online intake, no in-person visit required.

Figures above are indicative ranges; the final quote depends on page count, language pair and receiving authority.

Ask us or request a quote right away

094-895-8999 LINE @Thainotary Contact@thainotary.co.th

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