Do I need to prove that my retirement extension funds came from overseas?

and yet again, another thread devolved into the "4 months frozen account" bangkok bank ONLY conversation.

People that has NOTHING to do with visa advice, it's a bank policy

We are done, best of luck to the O/P

Bangkok bank demand the 800k for 4 months before they make the statement

No.

What do you call it if you are applying for an annual retirement extension? Is this different than the initial retirement extension.

Isn’t there a requirement for a 12 month bank statement under this situation?

To get a year extension based on retirement using banked money method there is no requirement that the funds come from abroad.

You need to have the funds in a thai bank account in your name only for 2 months before you apply for the year extension, the funds need to stay in the account for 3 months after the extension is granted and then the balance can't go below 400k baht the rest of the year.

The documentation you need from the bank is a 3 month detail transaction report (statement), the 'standard bank letter' (stating your name, account, date and balance the day the letter was written) and then update the bank book the date you apply for the extension