Services

Notarial & Document Authentication Services in Thailand

Legal documents used internationally often require verification beyond a standard signature. In Thailand, this process is carried out through licensed Notarial Services Attorneys, who are authorised to verify identities, witness signatures, certify true copies, and attest to the authenticity of documents.
BASE Law Firm offers a complete suite of notarisation and document-certification services, ensuring your paperwork is properly executed for use in Thailand or abroad.

Our service include:

  • Identity verification and signature witnessing
  • Certification of true document copies
  • Notarial affidavits and declarations preparation
  • Embassy legalisation and MFA coordination
  • Corporate notarisation: resolutions, powers, contracts
  • Apostille alternatives and international formalities

Understanding Notarial Services in Thailand

Unlike many countries that appoint public notaries through government bodies, Thailand recognises Notarial Services Attorneys under the Lawyers Council of Thailand. Only qualified lawyers who have been certified by the Council can perform these duties.

Notarial services may be required when:

  • Submitting official documents to foreign embassies or government agencies

  • Opening overseas bank accounts

  • Executing affidavits or statutory declarations

  • Preparing contracts or corporate records for cross-border use

  • Handling international business transactions

  • Supporting visa, immigration, and property-related applications


Whenever a document needs to be legally recognised outside Thailand, or needs formal verification locally, proper notarisation is essential.

Services Provided by BASE Law Firm

Verification of Identity and Witnessing of Signatures

We confirm an individual’s identity, witness signatures, and certify that the signing occurred in our presence, following the Lawyers Council’s required formalities.

Certification of True Copies

We compare original documents against copies and certify that the copies are true and accurate representations of the original.

Attestation & Document Authentication

We issue notarial certificates confirming the authenticity of:

  • Passports and identification documents

  • Educational qualifications

  • Corporate records, resolutions, and agreements

  • Financial statements and bank letters

Preparation of Affidavits and Declarations

Our team prepares and notarises sworn statements or declarations required for use in foreign jurisdictions or for official submissions.

Assistance with Embassy Legalisation & Apostille Alternatives

As Thailand is not a member of the Hague Apostille Convention, some documents require further legalisation by:

  • The Ministry of Foreign Affairs

  • The embassy or consulate of the destination country

BASE Law Firm coordinates these steps to ensure your documents meet the destination country’s requirements.

Corporate Notarisation Services

We regularly assist companies with:

  • Board resolutions

  • Shareholder statements

  • Powers of attorney

  • Commercial agreements

  • International bidding and tender documents

When Notarial Services Are Required

Notarised documents are commonly needed for:

  • Immigration applications and residency matters

  • Foreign work applications

  • Overseas education enrolment

  • Banking and financial transactions

  • Property acquisitions abroad

  • International litigation or arbitration procedures

  • Business transactions requiring cross-border verification


Whether for personal matters or commercial dealings, notarisation ensures your documents are accepted and legally compliant.

Why Choose BASE Law Firm

Licensed Notarial Services Attorneys

Our team consists of lawyers formally authorised by the Lawyers Council of Thailand to perform notarial duties.

Precision and Compliance

We strictly follow procedural requirements to ensure every document meets both Thai regulations and foreign-jurisdiction standards.

Fast and Reliable Turnaround

We offer efficient scheduling, same-day services when urgent, and clear instructions to avoid delays.

Support for Local and International Use

From notarisation to ministry legalisation and embassy follow-through, BASE Law Firm manages the full chain of document authentication.

Multilingual Expertise

Our team assists clients from diverse backgrounds and ensures documents, translations, and certifications are prepared accurately.

Typical Engagements

  • A foreign national requiring notarised passport and bank statements for an overseas visa application

  • A company preparing notarised corporate documents for international tenders

  • Individuals needing sworn declarations or certified copies for education, employment, or immigration

  • Businesses authenticating agreements or resolutions for foreign corporate transactions

  • Clients requiring document legalisation with Thai authorities and foreign embassies

How We Work

Step 1: Consultation

We review the documents and confirm the notarisation requirements for the receiving authority.

Step 2: Document Preparation

If needed, we prepare affidavits, declarations, copies, or translations.

Step 3: Notarial Certification

Our licensed attorneys verify identity, witness signatures, certify documents, and issue official notarial certificates.

Step 4: Legalisation (Optional)

We assist with additional requirements such as Ministry of Foreign Affairs legalisation or embassy endorsement.

Contact BASE Law Firm

Whether you need a single document notarised or full support for embassy legalisation, BASE Law Firm delivers precise, efficient, and compliant notarial services.
Reach out to schedule an appointment or request urgent assistance.

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