How do I legalise a Thai single status certificate for use in the United States?

This is the question most people using Thai documents abroad ask — When the Apostille Convention enters into force for Thailand on 28 February 2027, documents moving between Thailand and other member states will need only a single Apostille certificate, with no embassy counter-legalisation. Until then, plan around the date the document will actually be lodged and use the route the destination accepts on that day. Once the Apostille Convention takes effect for Thailand in 2027 we migrate your document route automatically, with no restart.