@Bill ******
this tag is an internal transfer between Thai Banks.
If your transfer was routed through Kasikorn Bank and then to Bangkok Bank. I believe you will need the following.
I did this this week for the September transfer. For the rest of the year I will do SWIFT transfers to avoid this potential problem.
1. An FET letter from K-bank International Services. K-bank will likely ask you to bring a receipt for the deposit from Bangkok bank first.
2. Bangkok Bank will only provide the receipt from the branch where the account was opened.
At least two branches here in Bangkok told me that I needed to drive to Buriram where I opened the original account to get this receipt.