How do you prove that a Thai maiden name and a married name belong to the same person for USCIS?
TL;DRA Thai Certificate of Registration of Change of Surname (Form Ch.5) recorded a wife changing her maiden surname to her American husband's surname after marriage. We translated it as the bridge that links her pre-marriage and post-marriage identities for a USCIS filing. We matched the new surname to the husband's passport and kept her maiden surname consistent with her other Thai records. The certified translation was delivered for the client's marriage-based green card filing.
Case Specifications
- Document
- Certificate of change of surname
- Foreign Name
- หนังสือสำคัญการเปลี่ยนชื่อสกุล (แบบ ช.5)
- Country
- Thailand
- Languages
- Thai → English
- Submitted To
- USCIS marriage-based green card filing
What We Received
A client sent us a Thai Certificate of Registration of Change of Surname (Form Ch.5). A Thai district office issues this document when someone changes their surname. This one recorded a Thai wife taking her U.S.-citizen husband's surname after marriage. The couple needed a [certified name-change document translation](/documents/name-change-record) for a [marriage-based green card filing](/immigration/green-card).
The certificate names the wife under her maiden surname, then records the new surname she adopted and the reason: marriage. It carries the district office, an official red seal, the registrar's signature and rank, and dates in the Thai Buddhist Era. The original reached us as a photo taken at an angle, so we first corrected the perspective to read the small print.

Why This Document Carries the Whole Name Change
On a marriage-based filing, the foreign spouse appears under two surnames across the packet. Her older records show her maiden name. Her passport and newer records show her married name. USCIS needs one document that connects the two, and this certificate is it.
That puts two consistency demands on a single page. The new surname is a Western name written in Thai phonetic script, so it has to match the husband's U.S. passport. The maiden surname has to match the spelling used on her other Thai records, such as the marriage certificate. Miss either, and the bridge stops connecting the two identities — a classic [name mismatch](/guides/name-mismatch-guide).
The form itself adds Thai-specific wrinkles. The registrar signs under an abbreviated civil-service rank, and the dates use the Buddhist Era. Left as raw initials or an unconverted year, those details confuse a U.S. adjudicator.
How We Handled It
We rendered the new surname to match the husband's U.S. passport, exactly as we had on the couple's marriage certificate. We rendered the maiden surname with the same phonetic spelling we used on that marriage certificate. One maiden spelling, one married spelling, identical across every document in the packet.
We expanded the registrar's abbreviated rank into its full English form instead of leaving the Thai initials. We rendered the registrar's post as "Administrative Officer, Professional Level," the Thai civil-service grade, rather than guessing at "Senior." Thai numerals became Arabic numerals, and each Buddhist-Era date was shown alongside its Gregorian equivalent.
The red official seal was described in brackets, and the handwritten signature was marked illegible. The certified translation met USCIS [certified-translation requirements](/accepted-by/uscis) and shipped with the original-language source.
"The bearer's maiden surname and the adopted (married) surname appear in the original in Thai script only. The married surname has been rendered to match the spelling on the husband's U.S. passport; the maiden surname has been transliterated phonetically and kept identical to the spelling used on the bearer's marriage certificate. The registrar's abbreviated rank (จ.อ.) has been expanded to its full English form. Thai numerals have been converted to Arabic numerals, and dates are shown in both the Thai Buddhist Era (B.E.) and the Gregorian calendar."
Because this certificate and the marriage certificate came from the same client, we reviewed both together to be sure every shared name matched across the two translations before delivery.
The Outcome
We delivered the certified translation for the client's marriage-based green card filing. The married surname matched the husband's U.S. passport, and the maiden surname matched the couple's marriage certificate translation.
The client reviewed the translation and confirmed that both spellings were correct. Across the packet, the wife now reads as one person under two surnames — which is exactly what the certificate is meant to show.
What This Means for You
If you changed your surname after marriage abroad, the change-of-surname certificate is your bridge document for USCIS. Have it translated so the new surname matches your passport and the old surname matches your earlier records. A consistent [certified name-change document translation](/documents/name-change-record) keeps your maiden and married names tied to one person.
Have a similar situation?
We translate Thai change-of-surname certificates, marriage records, and other civil-registry documents for USCIS family filings — keeping every name consistent across your packet.
Related Cases & Resources
Sources & References
- Meet Translation Requirements·USCIS·Verified 2026-06-06
- Form I-130, Petition for Alien Relative·USCIS·Verified 2026-06-06
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