Notarial Services
One Wrong Stamp and the Whole Chain Fails
Documents are the currency of cross-border life. Every visa application, property transaction, company registration, court filing, and family matter requires documents that the receiving authority will accept — and in Thailand, acceptance depends on following the right authentication chain in the right order. A missing translation, an incorrect notarisation, a legalisation stamp from the wrong authority, or an embassy certification obtained out of sequence, and your filing is rejected, your transaction delayed, and your timeline broken.
Thailand is not a party to the Hague Apostille Convention. This means the simplified apostille system used by 128 countries does not apply here. Instead, Thailand follows a full consular legalisation process: documents moving into Thailand must be authenticated by the issuing country’s authorities, then by the Thai embassy or consulate abroad, and finally by the Thai Ministry of Foreign Affairs (MFA). Documents moving out of Thailand follow the reverse chain: notarisation by a licensed Notarial Services Attorney, legalisation by the MFA, and authentication by the destination country’s embassy in Bangkok. Each step in the chain verifies the step before it — skip one, and everything after it is invalid.
At Samui Legal & Tax, our licensed Notarial Services Attorneys handle every step of the process — from drafting and notarising documents on Koh Samui, through translation and MFA legalisation in Bangkok, to embassy authentication and return delivery. We know what each receiving authority requires, which stamps they check for, and how to avoid the rejections that cost time and money.
What We Handle
Every Document, Every Stamp, Every Step
Document Notarisation
Thailand does not have Notaries Public in the Western sense. Instead, licensed Notarial Services Attorneys (NSAs) — Thai lawyers authorised by the Lawyers Council of Thailand — perform notarial functions: witnessing signatures, verifying identities, certifying documents, and administering oaths. The person whose signature is being notarised must appear in person with valid identification (passport for foreigners). Our NSAs verify your identity, witness your signature, and affix the official notarial seal, stamp, and signature. This notarisation is recognised by Thai authorities and forms the first link in the legalisation chain for documents going abroad. We notarise: contracts, powers of attorney, affidavits, corporate resolutions, consent letters, statutory declarations, and any document requiring authenticated signatures.
Certified True Copies
Many Thai and foreign authorities require certified true copies rather than photocopies. A certified true copy is a photocopy of an original document that has been verified and stamped by an NSA as being a true and accurate reproduction of the original. Common documents requiring certified copies include: passports, national ID cards, driving licences, academic degrees and diplomas, company registration certificates, title deeds, marriage and divorce certificates, and birth certificates. The NSA examines the original, confirms the copy matches, and affixes the certification stamp. For immigration applications, Land Office filings, bank account openings, and company registrations, certified true copies are routinely required — and a plain photocopy will be rejected. We provide same-day certified copy services on Koh Samui.
Certified Translation
Thai government authorities — courts, the Land Department, Immigration, the Department of Business Development — generally require documents to be in Thai. Foreign-language documents must be translated into Thai by a qualified translator, with the translation certified by an NSA or accompanied by a translator’s affidavit of accuracy. The certified translation is then treated by Thai authorities as the operative text. We provide bilingual (Thai–English) certified translations for: contracts, court judgments, corporate documents, personal certificates (birth, marriage, death, divorce), academic credentials, financial statements, powers of attorney, and wills. Translations are prepared by experienced legal translators who use the correct Thai legal terminology that authorities recognise — not literal translations that cause confusion or rejection at the filing stage.
MFA Legalisation
The Ministry of Foreign Affairs (MFA) Legalization Division in Bangkok is the central authentication authority for Thailand. The MFA verifies the notarisation or official stamp on a document and affixes its own legalisation stamp — either “Seen at the Ministry of Foreign Affairs” or “Certified Genuine Signature of.” This step is required both for Thai documents going abroad (after notarisation, before embassy authentication) and for foreign documents entering Thailand (after consular authentication abroad, as the final Thai-side verification). MFA processing typically takes 3–5 business days, with express options sometimes available. The MFA fee is approximately THB 200 per stamp (varies by document category). We handle the entire MFA submission process in Bangkok — document preparation, filing, follow-up, and return delivery to Koh Samui.
Embassy & Consulate Authentication
For documents intended for use in a foreign country, the final step after MFA legalisation is authentication by the embassy or consulate of the destination country in Bangkok. The embassy verifies the MFA’s stamp and affixes its own consular certification, confirming the document’s validity for use in that jurisdiction. Each embassy has its own procedures, requirements, fees, and processing times — some require appointments, specific forms, or additional documentation. We manage embassy authentication for all major embassies in Bangkok, including the US, UK, French, German, Australian, Japanese, Korean, and other missions. For documents coming into Thailand from abroad, the reverse applies: the document must first be authenticated by the Thai embassy or consulate in the country of origin before MFA legalisation in Thailand.
Powers of Attorney
A Power of Attorney (POA) authorises another person to act on your behalf in legal, financial, or administrative matters. In Thailand, POAs are essential for foreigners who cannot be physically present for: property transactions (the Land Department requires specific POA forms — Tor Dor 21 for land, Or Chor 21 for condominiums), company registrations, bank operations, court proceedings, and government filings. We draft both general POAs (broad authority across multiple matters) and specific POAs (limited to a defined transaction). POAs must be signed in the presence of an NSA, are subject to stamp duty, and — if intended for use with Thai government agencies — must use the agency’s prescribed Thai-language forms. For POAs signed abroad, the document must be notarised in the foreign jurisdiction and then legalised through the consular chain before it is accepted in Thailand.
Affidavits & Statutory Declarations
An affidavit is a written sworn statement of fact, signed under oath before an NSA. Common affidavits for foreigners in Thailand include: affidavits of single status (for marriage registration), affidavits of income or financial standing, affidavits for lost documents, affidavits of residence, and affidavits supporting court or immigration applications. A statutory declaration is similar but made by way of solemn declaration rather than oath. We draft affidavits in both English and Thai, ensure the content meets the requirements of the receiving authority (embassy, district office, court, or government agency), and administer the oath or affirmation before our NSA. Note: some embassies (US, UK, Australian) provide their own affidavit services for their nationals — but these are limited in scope, and documents for Thai authorities generally require an NSA-certified affidavit.
Corporate Document Authentication
International business transactions frequently require authenticated corporate documents: certificates of incorporation, memoranda and articles of association, board resolutions, shareholder registers, financial statements, audit reports, company extracts, and powers of attorney for company directors. For Thai companies conducting business abroad, we obtain certified copies from the Department of Business Development (DBD), prepare translations, notarise through our NSA, legalise at the MFA, and authenticate at the destination embassy. For foreign companies operating in Thailand, we process incoming corporate documents through the reverse chain — ensuring they arrive ready for filing with Thai authorities such as the DBD, Land Department, Revenue Department, or courts. We understand the specific requirements of each Thai agency and prepare documentation packages accordingly.
Cross-Border Document Coordination
Many transactions require documents to move in both directions — foreign documents into Thailand and Thai documents abroad — often simultaneously. A property purchase may require a legalised foreign POA while also producing a Thai sale agreement that needs to be recognised in the buyer’s home country. A divorce may involve Thai court judgments that must be authenticated for foreign registration, alongside foreign prenuptial agreements that need Thai-side legalisation. We coordinate the entire cross-border document flow: identifying what each authority requires, sequencing the authentication steps correctly, managing parallel processing in Bangkok and abroad, and ensuring all documents arrive in the right format at the right time. For clients on the islands, this means one point of contact for a process that would otherwise require multiple trips to Bangkok and direct engagement with embassies.
Two Directions, Two Different Processes
Because Thailand is not an Apostille Convention member, documents must follow a full consular legalisation chain. The sequence depends on which direction the document is travelling.
Bringing Documents Into Thailand
Step 1: Obtain the original document in the foreign country.
Step 2: Have the document notarised/authenticated by the issuing country's competent authority (e.g., Secretary of State, Foreign Ministry, notary public).
Step 3: Present to the Royal Thai Embassy or Consulate in that country for consular legalisation.
Step 4: Translate into Thai by a certified translator (if not already in Thai).
Step 5: Submit the legalised original + certified Thai translation to the Thai MFA Legalization Division for final authentication.
Timeline: Allow 2–4 weeks depending on the country of origin and embassy processing times.
Sending Documents Abroad
Step 1: Obtain the original Thai document (from the issuing agency, court, or DBD).
Step 2: Have the document notarised by a licensed Notarial Services Attorney (if required by the destination).
Step 3: Translate into the destination language by a certified translator (if required).
Step 4: Submit to the Thai MFA Legalization Division for authentication.
Step 5: Present to the embassy or consulate of the destination country in Bangkok for final consular certification.
Timeline: Allow 1–3 weeks depending on MFA queue and embassy processing times.
Common Documents Requiring Notarisation or Legalisation
We handle every category of document that foreigners on the islands typically need processed — personal, corporate, property, and legal.
Personal Identity
Passport copies, national IDs, driving licences, residence certificates, criminal record checks.
Vital Status
Birth, marriage, divorce, and death certificates. Affirmations of single status for marriage registration.
Educational
Degrees, diplomas, transcripts, professional licences, and training certificates for employment or visa applications.
Financial
Bank statements, income verification letters, tax returns, audit reports, and financial guarantees.
Corporate
Company certificates, memoranda, articles, board resolutions, shareholder lists, and extracts.
Property
Title deeds, sale agreements, lease contracts, Land Department POAs (Tor Dor 21, Or Chor 21).
Contracts
Commercial agreements, service contracts, joint venture agreements, franchise agreements.
Legal & Court
Court judgments, divorce decrees, custody orders, wills, probate orders, and arbitral awards.
From Your Desk on Samui to the Receiving Authority
A streamlined process that eliminates trips to Bangkok and direct dealings with government offices and embassies.
Assess
Identify what the receiving authority requires — which stamps, translations, and authentication steps are needed for your specific document and destination.
Prepare
Draft or obtain the document, prepare certified translations, and arrange any required notarisation on Koh Samui with our NSA.
Legalise
Submit to the MFA Legalization Division in Bangkok. Manage processing, follow up on any queries, and obtain the legalisation stamps.
Authenticate
Present to the relevant embassy or consulate for final authentication. Handle appointments, specific requirements, and fee payments.
Deliver
Return the completed, fully authenticated documents to you on Koh Samui — ready for submission to the receiving authority.
The 15 Questions Clients Ask Most About Document Processing
Ranked by frequency across our consultations. Click any question to expand.
Can a Thai document be used in my home country?
Only after outbound legalisation: (1) Original Thai document. (2) NSA notarisation. (3) Translation to the target language. (4) Thai MFA legalisation. (5) Final authentication by your home country's embassy in Bangkok.
Can I get documents notarised on Koh Samui?
Yes. Notarisation and signature witnessing can be done locally on Koh Samui by a licensed NSA. However, subsequent steps like MFA or Embassy legalisation must be handled in Bangkok. We typically manage the Bangkok logistics for Samui-based clients.
Can I sign a document abroad for use in Thailand?
Yes, but it must be notarised in that country, authenticated by that government, legalised by the Royal Thai Embassy there, and finally verified by the Thai MFA in Bangkok. Without this chain, Thai courts and the Land Department will reject it.
Can my embassy notarise documents?
Only partially. While some embassies (US, UK, Australia) offer limited services like signature acknowledgments or residency affirmations, they often cannot certify commercial or educational documents. Thai authorities usually prefer NSA notarisation for domestic use.
Do I need a certified translation?
Generally, yes. Thai courts, Immigration, and the Land Department require certified Thai translations. While some private entities accept English, official filings treat the Thai text as the operative version.
Does Thailand accept apostille stamps?
No. Thailand is not a party to the Hague Apostille Convention as of early 2026. Documents must go through the full consular legalisation chain: authentication in the country of origin, Thai Embassy legalisation, translation, and final Thai MFA verification.
How do I get a foreign document accepted in Thailand?
The 5-step process: (1) Obtain original foreign document. (2) Authenticate by home country authority. (3) Legalise via Royal Thai Embassy in that country. (4) Translate into Thai. (5) Final verification by the Thai MFA Legalization Division in Bangkok.
How long does the legalisation process take?
Documents entering Thailand: 2–4 weeks total. Documents going abroad: 1–3 weeks. MFA processing in Bangkok typically takes 3–5 business days, while translation adds another 1–3 days.
How much does notarisation and legalisation cost?
NSA notarisation is typically THB 1,500–2,500 per seal. MFA fees are approx THB 200/stamp plus handling. Embassy fees vary (THB 1,000–5,000+). A full international chain for one document usually totals THB 5,000–15,000 including all fees.
Is Thailand planning to join the Apostille Convention?
Yes, Thailand is actively working toward it and joined the HCCH in 2021. However, as of 2026, ratification has not occurred. Until then, the multi-step consular process remains the only legal method.
What documents do I need for marriage registration?
Foreigners need an 'Affirmation of Freedom to Marry' from their embassy in Bangkok, translated into Thai and legalised by the MFA. Passports, Thai ID/House Reg (for the spouse), and legalised divorce decrees (if applicable) are also required.
What happens if my document is rejected?
Rejections usually stem from skipped steps, poor translations, or expired documents (older than 3-6 months). Most can be cured by restarting the specific failed step. We verify requirements with the receiving authority beforehand to prevent this.
What is a Notarial Services Attorney (NSA)?
Thailand uses Notarial Services Attorneys (NSAs) instead of a traditional Notary Public. Licensed by the Lawyers Council of Thailand, they are authorised to witness signatures, verify identities, and certify documents. Their certifications are substantively equivalent to a Notary Public.
What is required for a Power of Attorney in Thailand?
Must be drafted correctly, signed in person before an NSA, and stamped with a Thai duty stamp. For Land Department matters, specific Thai-language forms (Tor Dor 21/Or Chor 21) are mandatory. If signed abroad, it requires the full consular legalisation chain.
What is the difference between notarisation and legalisation?
Notarisation authenticates a document for use within Thailand (witnessed by an NSA). Legalisation is the chain of stamps (MFA/Embassy) required for a document to be valid across international borders. Notarisation is the foundation; legalisation is the superstructure.