Notarisation of Trademark and IP Powers of Attorney — Thailand (2026)

Required for overseas trademark filings, Madrid Protocol applications via WIPO and patent filings through foreign agents, many of which require a witnessed power of attorney.

The destination agent's POA form · Company affidavit and evidence of signing authority · Mark or patent details: application number, filing countries and classes

Witnessing the signature of the rights holder's authorised signatory

The rights holder's name on the POA not matching the corporate register · Listing incomplete classes of goods or services · Not allowing time for legalisation and missing the priority date

Check with the destination agent whether MFA and embassy legalisation are needed; some countries accept notarisation alone.

Same day, with expedited handling near a priority deadline. 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.