Just a note to highlight a few things that might be useful to anybody visiting CW for the Non O retirement visa extension.
I used the 800K method with Bangkok Bank.
1) The document check lady was a young trainee that briefly checked through the
my paperwork
2) I arrived one hour early for my appointment but was seen pretty much on my appointment time. The queue numbers were displayed on electronic notice boards and called as well. I have read in other posts that the queue numbers were not called but this was not true on the day I attended.
3) I supplied what I thought was all the relevant paperwork with the exception of the first and last page of my current passbook. This was not a problem since the IO had a photocopier next to her desk and did the copying for me π
4) I obtained 12 months worth of statements from my local branch (200THB) starting from 2 months before my last extension and my last 6 months from the CW branch of Bangkok Bank in addition to the standard balance confirmation letter (Toal cost 200THB). There was obviously a little overlap here of transaction postings but better too much than too little I thought. One thing which maybe of interest is that unlike the 6 month statements obtained from the CW branch the 12 month statement from my branch was not officially stamped but is printed on headed Bangkok Bank computer stationary including the sprocket feed holes which branch staff assured me would be OK. As pointed out in previous posts there is a delay in the delivery of the statement since the printing is done in head office, mine was completed in 3 days. The IO lady did want to see my previous passbook to confirm the 800k balance was still in the account for 3 months after the previous extension. I thought that was the purpose of the 12 monthly statements but she wanted to see both.
Anyway it all worked out fine and the extension was issued.
I guess I should add that this was my own personal experience on a particular day in front of a random IO at CW. I hope it may help.