Look for the FBAR website online. You can easily file it yourself. It only takes a couple of minutes. You need to have a yearlong bank statement and find the largest balance over $10,000 during the year. That is the number you will enter into the FBAR online form. I’ve done it myself for 7 years.
Once you get an account at a branch then that is your branch. I got my Kasikorn account at a BKK branch. Then I moved outside Bangkok. I couldn’t just move the account to my countryside branch. I even had to come to Bangkok to close the account
My pensioner LTR was a long time ago (2023) but yes, they continued to ask for more documents. In my case they wanted copies of additional pages in my passport. The email back & forth will add a few more days to your wait time.
Mostly what I’ve heard is that they are getting a better rate of return on the $23,700 in their home accounts and that they don’t trust Thai banks. Everyone has their wants and needs.
I’ve heard that some people do that. I didn’t do that because I live in Thailand full time. I would never be in the US long enough to complete the OA application process which is a bit of a pain. It’s a peculiar visa and some people benefit from the peculiarities.
It also benefits people that don’t want to open a Thai bank account because you can keep applying using funds in your home country bank.
I did get 18 months on my OA visa because of a trip to Cambodia but I really didn’t care about the extra months. Yearly extensions is where most people want to be.