NYCVisa · Notarial Services Attorney
Patent Assignment Certification in Thailand
Assigning a Thai patent or patent application must be in writing and registered with the Department of Intellectual Property under the Patent Act. Where parties are abroad, they usually sign before a notary and complete further certification before sending to Thailand.
Certification scope and key checks
Cite the Thai application or patent number, not just foreign equivalents.
If inventors assigned to an employer, keep the full chain of title.
A notary does not assess novelty or validity.
Documents to prepare
- Assignment deed
- Thai application/patent number
- Identity and signing authority
Procedure for this document
- Check the Department's forms
- Sign before a notary
- Further certification as required
- Translate and file for recordal
Overseas use: confirm the recipient’s route
Notarization is not required for every public record, and some uses need no onward legalisation. Confirm whether the recipient needs an original, copy, translation or specific certification before arranging MFA and embassy steps where applicable.
Thailand deposited its accession on 30 June 2026. The Apostille Convention is scheduled to enter into force for Thailand on 28 February 2027. Do not assume Thai Apostilles are available before then. Even after entry into force, document scope and treaty relations with the destination must be checked.
Questions before booking
- Can a foreign assignment be used?
- Possibly, if it identifies the Thai rights and is certified as required.
- Can recordal be skipped?
- The law requires registration; complete it.
- Can the notary draft it?
- Drafting is for a patent attorney; the notary certifies signatures.
- Are MFA and embassy legalisation always needed?
- No. Ask the recipient to confirm the certification, language and onward steps. Notarization, translation and legalisation are distinct; do not perform every step automatically.
- How are fees and timing assessed?
- After reviewing the form, copies, signers, language and onward steps, we provide a quote and indicative schedule before work. Authority queues and outcomes are not guaranteed.
- What should I send before booking?
- Send the record type, destination country, receiving authority and its checklist through a direct contact channel. Redact personal information unnecessary for the initial enquiry.
📚 Official sources and current requirements
Content reviewed 8 October 2026. General information, not case-specific legal advice. Confirm current requirements with the recipient before filing; document acceptance and application outcomes are not guaranteed.
Send the recipient’s checklist before booking
Initial enquiry for scoping and a quote is free; case-specific legal advice is not included.