Hi. I'm going to Immigration Division 1 first week of October to extend my current stamp valid until Oct 31 granted under OA visa. I think I got all the requirements in order. Insurance ready and 800K++ in the Thai bank since December 2023.

But I'm a bit confused about what documents I need to provide for the financial proof. Bank book isnt enough? Do I need the inward international transfer receipt? Is that ok that transfer was made on December 2023?

I read something about I need to request an additional letter from the bank. What is this letter exactly? How old can this document be issued since I will submit all the documents on the first week of October.

I would appreciate any clarification on this matter. Thanks in advance.