Wylie Pfaff, many Amphurs say you need to be married, but that is, in fact, incorrect. I read a thread on another expat platform where a guy got his girlfriend to contact the ombudsman, and they forced his local Amphur to issue his yellow book and pink ID card.
I've never heard of a provisional passport. However, you must have your old passport with you, as the DTV will have that passport number. You can attend any immigration office and have the DTV updated with your new passport number. I had to do that with my Non-O
I know the rejection says wrong passport type, but you stated broker accounts for the funds, and there have been many reports where these are not accepted. The funds need to be in your personal bank account.
If you are thinking of a retirement visa then simply get non-o immigration visa based on retirement while you are in the UK. There is no compulsory insurance requirement
Currently, if you stay here more than 180 days in any calendar year, then you are deemed a tax resident. It has nothing to do with having a bank account. However, you only have a tax liability here if you bring onshore funds that have not been taxed under a double taxation agreement. Most countries have a double taxation agreement with Thailand, and therefore, most people do not have a tax liability. At the moment, a tax return is only required if you have a tax liability and not just because you resided here more than 180 days.
A non-O Imm visa is a 90-day single-entry only, but you can apply to extend it based on marriage for 12 months by depositing 400k baht in a Thai bank account for two months before applying for the extension. The money does not have to stay in the account once the extension is granted. When the extension is granted, you can buy a single re-entry permit for 1000 baht or a multi-re-entry permit for 3000 baht. This allows you to exit and re-enter without affecting your permission to stay. The other option is a multiple-entry tourist visa (METV). This lasts for 6 months, but you can squeeze nearly 9 months out of it. It gives you a 60-day entry, which you can extend at the nearest immigration office by a further 30 days for 1900 baht. So, if you do this twice and return just before the 6 months are up, they will give you a further 60 days, which you can extend again. If you are wealthy, you may want to look at the 10-year Long Term Visa (LTR)