A legal marriage in Thailand consists of both parties registering their marriage in person with the local Thai Amphur (Civil Registry Office). The United States does recognize the validity of such a marriage. For American citizens marrying either Thai citizens or another American citizen, the procedure is the same. For Americans marrying a third-country national, their prospective spouse must also follow a similar procedure with their own embassy.
Procedure
1. Complete an affidavit at the American Embassy. The affidavit form, available upon request, includes all of the information required by relevant Thai law. The form must be completed and notarized at the Embassy.
2. Have the notarized affidavit translated.
3. Take the affidavit and translation to:
Legalization Division
Department of Consular Affairs
Ministry of Foreign Affairs
3rd Floor, 123 Chaeng Wattana Road
Tung Song Hong, Laksi District, Bangkok
Tel:(02) 575-1057-8, Fax:(02) 575-1054
4. Take the affidavit and supporting documents to a local Amphur and register yourselves as...