Exactly, I just wanted to produce the letter as proof but they made me produce a lot more including the bank book. I also produced a letter from the bank with all my international transfers listed.
I have no problem providing that but one of the proofs is a FTT notation in my bank book to indicate international transfer which it appears I can no longer get from Transferwise. Hence why I wondered if just the letter was acceptable.
Benjamin I entered on an Irish passport, the only nationality I have ever held. I had a fully legit letter from the Irish embassy for which I paid 1500baht and provided all my income proofs to get it.
The reason I ask is that they refused my letter for my last extension and I had to prove my income using other methods including my bank book transfers noted as FTT via Transferwise. Now it seems Transferwise are no longer providing this service to long time expats in Thailand.
You should have a letter with your new passport, bring that along with both passports to immigration, they will give you a receipt and you go back the next day to collect. I did mine about two months ago at Jomtien.
I use the 65k method because I didn`t want to change 800k at about 40 baht to £ and have it sitting doing nothing. I put a post up earlier that explained in Jomtien that the proof of income letter is worthless anyway, they still want to see all the proofs that you were required to produce to get the letter. Admin shut it down so I deleted it, my experience this week could have saved some people a lot of hassle.