Thai change of name and surname certificate translation
In short
Translate every change of name or surname certificate that sits between the oldest document in the set and the current passport, so the authority can trace one identity across the whole set without inferring anything.
Thailand issues separate certificates for a change of given name (Chor 3) and a change of surname (Chor 5), and surnames also change through marriage or divorce records. When earlier documents carry an older name, these certificates are what let an authority connect them to the current passport.
Issued by: District registrar (Amphoe / Khet) under the Department of Provincial Administration
When it is used
- • Connecting a birth certificate in an old name to the current passport
- • Explaining a surname difference between spouses' documents
- • Academic records issued under a former name in a skills assessment
- • Employment and financial records in a former name
What to prepare
- • Every change of name and surname certificate in the chain
- • The current passport copy
- • The documents that carry the older name, so the chain can be checked
- • The receiving authority and country
Step by step
Map the name chain
List each name used and the document that records the change, from the oldest record to the passport.
Fill any gaps
Request missing certificates from the district office; a broken chain is the usual reason an authority queries identity.
Translate each certificate
Certificate number, old and new names, date of change and the registrar's endorsement are all translated.
Submit the chain together
Present the certificates alongside the documents they explain, in date order, so the authority reads them as one sequence.
Common reasons for rejection
- • Submitting the current name certificate but not the intermediate ones.
- • Assuming a marriage certificate alone explains a surname change in every jurisdiction.
- • Different romanisations of the same Thai name across certificates.
- • Leaving the authority to guess that two documents refer to the same person.
FAQ
How many certificates do I need to translate?
Every one in the chain between the oldest submitted document and the current passport. Skipping a link is what causes identity questions.
My surname changed on marriage, not by certificate. What proves it?
The marriage record generally shows the surname change. Some authorities also want the surname change certificate issued by the district office; check what was listed.
Can I just explain the difference in a cover letter?
A letter alone rarely satisfies an assessor. The registrar-issued certificate, translated, is the evidence.
Does the translated name follow the certificate or the passport?
The translation shows the names exactly as they appear on the certificate, and we keep the passport spelling consistent for the person's current name across the set.
Related pages
Reviewed August 2026. Sources: https://consular.mfa.go.th/, https://www.bora.dopa.go.th/, https://pcscenter.sb.police.go.th/, https://immi.homeaffairs.gov.au/, https://www.naati.com.au/. General information for document preparation only, not immigration assistance. We are not a registered migration agent (OMARA).
Official sources you can verify
The information on this page is based on the official sources below. Reviewed August 2026. Requirements change — always confirm with the receiving authority before lodging.
- Department of Provincial Administration (Ministry of Interior)Civil and family registration records and certified copies.
- Department of Consular Affairs, MFA ThailandRules and procedures for legalisation of documents in Thailand.