Presnock

as several people have mentioned, anything coming from a foreign bank or organization has no meaning for the normal IO, the 12 monthly statements of foreign transfers must come from one of the THAI banks. Plus you would normally need to update your bank book on the day you do the extension request and some IO's ask for a copy of "all" pages of the bank book. As I previously mentioned, I do the monthly transfers and used to provide a lot from my stateside provided which this year the young IO just handed me all those documents and only used the local bank letters. Less than an hour total at immigration.

I do the monthly transfers and have done so since the US embassy ceased to provide a letter. and I do my extension in Chiang Mai which may or may not be different but, used to provide immigration with tons of documentation - i.e. statement from govt retirement income, letters of advice from my bank indicating what they sent each month, letters from Bangkok Bank indicating receipt of my money each month (12 individual payments, one each and every month), letter from bank indicating that I was the sole user of such account. This year, the immigration returned all documents from my overseas contacts, only wanting the Bangkok Bank letters. Guess they got tired of reading all those other documents. Bangkok Bank indicates on the twelve deposits that such are from overseas and is a must. The only sure way for you to know exactly that they might demand, you might visit with the immigration office there and ask/show them what you have or whatever you must have to do an extension. Good luck!