I've lived in Thailand 20+ years, non-O retirement visa, renewed annually at Chaeng Wattana. My 800k is held in a Bangkok Bank savings account kept solely for visa purpose; no withdrawals (other than accrued interest). Up to May 2024 I took my relevant BB passbook to the BB branch downstairs at CW plus passport plus photocopy of the whole BB account passbook & was able to obtain the bank letter on the spot before going up to the Immigration Department. Is that still possible?