Notarisation of Contracts and Cross-Border Agreements — Thailand (2026)

Confirms the parties signed in the attorney's presence, reducing disputes over signature authenticity in cross-border matters — often mandated where a counterparty or asset sits abroad.

The final, unsigned contract · ID or passport of every signatory · Company affidavit and evidence of signing authority for corporate parties

Witnessing the parties' signatures and the date of execution

Signing in advance and presenting the contract for certification afterwards · Omitting governing law and jurisdiction clauses · Assuming notarisation certifies the contract terms — it certifies the signatures only

For filing with a foreign authority, continue with MFA legalisation and embassy attestation.

Signing and notarisation completed in a single appointment, typically within an hour. Fees are based on the number of documents and stamps, and you get a written quote before any work starts.

No. Thailand is not a party to the Hague Apostille Convention, so Thai documents intended for use abroad follow the legalisation route: certification by a notarial services attorney, then legalisation at the Department of Consular Affairs (Ministry of Foreign Affairs), then attestation at the destination country's embassy or consulate in Thailand. Check the current status with the HCCH and the Department of Consular Affairs before you act.

Thailand has no notary public office in the common-law sense. Instead, lawyers registered with the Lawyers Council of Thailand under its 2008 regulation act as Notarial Services Attorneys, and their certifications are the form accepted by foreign authorities.

Yes for signature certification — you sign in the attorney's presence with an original passport or Thai ID. For a certified true copy, the original document must be produced.