Roquefort,
I have been a user of Wise, formerly known as TransferWise, for a number of years and whilst previously, I experienced my transfers mostly going directly to my assigned bank (Bangkok Bank), sometimes it arrived having been received as an International Transfer (TFF) via a host bank (in my case, Kasikorn Bank in Chiang Mai) where it was posted as a TFF and then forwarded as a Domestic Transfer to Bangkok Bank.
The reasons were many and various depending on the time of the transfer, the day of the transfer, national or religious bank holidays, etc.
I use the monthly income method of extending my Retirement Extn so it was critical for me to get the requisite copies of the Kasikorn transactions to show the origination of the TFFs, so I visited the local Kasikorn branch in Phetchabun, a month prior to my Retirement extension, gave them copies of each of the Wise transfer receipts detailing the Kasikorn involvement, and they in turn produced an Annual statement for Immigration, which accompanied the Bangkok Bank annual declaration. There was a small charge for this but Phetchabun Immigration were satisfied with this.
As Wise has become more successful, I had no need to do this in 2023 because there were no instances of transfers going via alternative host banks so one letter from Bangkok Bank sufficed.
Just as a word of warning, there is a limited window to get the information from alternative banks so if you seek documentation for individual transactions within the year, they will become invalid as far as Thai Immigration is concerned - best to wait until a couple of weeks before your Immigration extension and get one letter to cover ALL diverted TFFs in the year.
Good Luck…🙏