Q1141. If my Thai civil registration name differs from my foreign passport name, which name will authorities prioritize?

Answered by NYC Visa & Translation

There is no safe blanket rule that either your Thai civil registration name or foreign passport name will automatically take priority. The Royal Thai Police must establish your identity, while the receiving immigration authority may require the certificate to match the passport used for that application. Present both records together with any official name-change, marriage, citizenship, or other documents linking the names. Ask the Police Clearance Service Center how the current name and previous or alternative names should appear before issuance. Translators should preserve the source document’s information and use supporting evidence for consistent romanization, rather than silently replacing one name with another.