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Notarial Services

Signature Certification

Witnessing and certifying a signature on a document you must sign in person — with the notarial certificate that accompanies it, in the form the receiving country expects.

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Tell us the situation and we will tell you what we think you should do — and what it will cost.

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Who this is for

  • People signing documents for use in another country
  • Applicants to foreign universities, banks and immigration authorities
  • Company officers signing corporate documents for overseas filings
  • Anyone told their signature must be “notarised”

What we handle

Scope of work

Certification of your signature, signed in the attorney’s presence

Identity verification and the record the certificate rests on

The notarial certificate itself, in the wording the destination requires

Certification of a company signatory’s authority alongside the signature

Witnessing where the document requires witnesses as well

Guidance on the legalisation steps that follow, where they apply

How it works

How we run the matter

  1. Tell us the destination country and what the receiving body requires
  2. Check the document and the certificate wording needed
  3. Attend with your identification
  4. Sign in the attorney’s presence
  5. Receive the certified document and its notarial certificate
  6. Proceed to further legalisation where the destination requires it

Documents to prepare

  • Passport or Thai ID card
  • The document to be signed — unsigned
  • Company affidavit, if signing on behalf of a company
  • Any instructions from the receiving body about the required wording
  • The name of the destination country

Common questions

A notarial services attorney — a lawyer specifically registered with the Lawyers Council of Thailand for this work. It is the Thai equivalent of what other countries call notarisation, and foreign authorities accept it in that capacity. Our certifications are carried out by Pongsanan Taongern, Notarial Services Attorney No. 811/2569.
No — the point of the certification is that the attorney witnessed you sign it, so the signing happens in his presence. Bring the document unsigned, with your passport or ID. If you have already signed, the page simply gets signed again in front of him.
No, and the distinction matters. The certificate attests who signed and that they signed in the attorney’s presence — not that what the document says is correct. Foreign authorities know this; problems arise only when someone assumes certification launders the contents.
It depends entirely on the receiving country. Many require further legalisation by the Ministry of Foreign Affairs and then the destination’s embassy; Thailand is not a party to the Apostille Convention, so an apostille is not available here. Ask the receiving body what chain it needs before you start — we then prepare the document to survive it. NOTARIAL_LIMITS
Your passport or Thai ID, the unsigned document, and — if you are signing for a company — the affidavit showing your authority. Certification itself is usually completed during the appointment; NOTARIAL_TIMEFRAME

Lawyers for this matter

Generation 1 Chanin Taongern

Founding Partner

Chanin Taongern

40+ years of courtroom and advisory experience

LitigationBusiness advisoryEmployment lawCivil and criminal matters
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Generation 2 Pongsanan Taongern

Partner

Pongsanan Taongern

Modern legal practice, business advisory and international client support

Corporate advisoryEmployment lawCross-border family lawInternational client servicesLegal workshops
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Related reading

Notarial & Documents 2026-08-065 min read

Getting a Thai document accepted abroad: the legalisation chain

Thailand issues no apostille, so documents travel by a longer route. Mapping the whole chain before the first step is what prevents a rejection at the third.

Official sources

The Thai authorities and legislation this work is carried out under. Requirements change; we confirm the current position for your matter.

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