there is a "residents certificate" form, it's in Thai , you get it from the imm dept, it needs the house owner to sign it, you need a copy of thier blue book and Thai ID.
Retirement is you have to have 800kthb tied up in thai bank for 2 months before, and 1 month after, then 400kthb for the year. Support of a thai child you need 400kthb in the bank when you make the submission, but the application takes 30 days because it's sent to Bangkok for approval (if your outside) so best to keep it above 400kthb during this. Paper work will require extra for the Thai, berth certificate, blue book for the child. But it can vary office to office so best to check.
There are several restrictions in place depending on how you send your money, if you use Wise or similar you can only send over 50k to the top
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banks like Bangkok bank and KBank. Your bank will probably have a restriction on your account as well which you can ask them to increase based on your credit risk.
It's not always about scaming, but many Thai ladies don't earn alot of money and have commitments to look after thier mother or family so there is an expectation that her partner will make a contribution to that cause, which can lead to "scams: in some cases. Just don't rush things.
take some chill pills bro, or were your supplies cut off? What I said is the correct, but if immigration don't follow the rules the advice on this group should be "ask the immigration officer" and sometimes that correct and sometimes not necessary. I've been here 15 years and have experience of 3 offices, the list a good sound starting point.