What documentation is needed for a retirement visa extension in Thailand, and have there been any recent changes?

I remember seeing a post about that too Bobby.

but I just had a good friend get his yearly extension based on retirement using monthly income method and all he showed was 12 months of incoming transfers from overseas at a minimum of 65K baht,

He had to get a 12 month detail transaction print out (More and more immigration offices are asking for the last 12 months detail transaction record because if you don't update your bank book at least every 20 transactions it will only print a summary of money in / money out during the last update and today. That won't work which is why you get the year detail transaction print out (usually takes 5 days for the bank to provide to you)

AND

you also need to update your bank book on the day you apply

AND

have the standard (5 line) bank letter that says you hold account xxx and on yyy it had zzz balance in it <- that letter can be up to 7 days old at most offices

He uses transfer wise and some of his transfers don't always code as international so he goes to his branch and gets a "credit advice" paper that states the incoming transfer did originate from abroad no matter what it coded in the bank book

Just one thing I read recently (how true this is I don't know). A guy went for the retirement extension - English guy - who uses the 65k/month method. Had all the necessary bank transfer documents, bank book, foreign transfer letter from the bank. The IO wanted to see his pension income statements from the UK, so he had to make a return visit after having got these from his pension fund. I wish I'd bookmarked the comment because I've not been able to find it. I did my last extension in January and didn't need this, but it might be worthwhile just getting your pension statement printed just in case. Perhaps others in this group may have had similar experience?