bank branch can only do 6 months you have to apply a week before your due to apply for your extension . Or you can get bank statement for 6 months with letter and copy 12 months yourself and sign each page. The accept this in Phuket if it matches the 6 months from the bank
was on non O ends 29th this month I've applied for a marriage visa hear back on the 28th if I'm not sucksessfull I've got the paperwork to apply for my retirement extension