Useful, I hope, account of what I learned while changing from a NON-OA TO a NON-O visa extension based on marriage:
WARNING: At the Thai embassy in HCMC, Vietnam I asked for the less expensive single entry visa and was told by two Imm. officers in excellent English and in no uncertain terms that if I purchased the multiple entry visa for $200 I would not need to get an extension when I returned - just do my 90 day reports. This was wrong! I still needed to get the extension. (My wife was told the same in Thai by the officers there.)
Lessons from Hua Hin Immigration applying for extension based on marriage:
1. The Photos – outside photo (with mate) must include the entire house (as well as house numbers clearly shown) inside photos (with mate) must include couch (sofa) and TV (or bedroom showing bed.)
2. Bank proof must include copy of bank book updated THE SAME DAY (as well as the letter and two months print-out of balances.)
3. If your passport needs to be renewed before the end of a year, you can only be extended to the date it (the passport) expires. (They can transfer your visa but not the extension. )
4. Proof-of-Marriage Certificate must be renewed within the past three months (can do this at a government office on the top floor of Market Village)
5. For renters – copy of landlord’s Thai ID, rental agreement and house registration (Tabien Baan) all signed by landlord.