How far must a child's birth certificate be translated and legalised to be accepted for registering the marriage overseas?

The approach receiving authorities accept is this: Marriage, divorce and single-status paperwork normally follows this chain: (1) obtain a current civil-registration extract from the district registrar, (2) translate into the language the destination requires using a translator it accepts, (3) have the translation or signature certified by a Thai Notarial Services Attorney where required, (4) legalise at the Department of Consular Affairs, and (5) attest again at the spouse's embassy when that is still requested. We handle the document side of marriage, divorce and single-status matters — certified translation, Notarial Services Attorney certification, MFA legalisation and embassy attestation. We do not act as family-law counsel. Tell us the destination country or authority and we run translation, notarial certification, MFA legalisation and embassy attestation as one job.