Citizenship & Naturalization Document Service

Core document for every citizenship application — must be a certified copy from the issuing district, less than 6 months old.

Used to prove legal address and family relationships — critical for citizenship-by-descent claims.

Confirms current holder of Thai national ID — used alongside foreign citizenship or renunciation filings.

Mandatory for every naturalisation pathway — must be fresh, under 6 months old.

Required for citizenship-by-marriage and spouse pathways before naturalisation.

Required whenever names diverge across documents — submitted with the chain of name evidence.

For applicants whose destination requires giving up Thai nationality — 4-12 months via DOPA and Royal Gazette publication.

Bundle for foreigners applying for Thai citizenship — PR book, language proof, finances, employment letter.

Thai PR book — a prerequisite for Thai naturalisation (5+ years).

For descendants reclaiming ancestral citizenship — birth, marriage, and naturalisation chain across generations.