Either 2 x 90day Non O based on retirement, bank statement showing 3 monthly incomes from work of over £1510 if still working. You could open a bank account here which would make it easier for local payments.
Or 2 visa exempt of 60 days each and extend by 30 days each time, this only works providing the 60 days on entry continues.
they didn’t ask me for this, visa and passport, Thai driving licence, rental agreement, I took TM30 and printed my phone document and they didn’t want it, so I guess each branch different
to be honest I can’t actually complain at Bangkok Bank, everybody had warned me to go and update my contact information, address, phone and Visa etc and I just didn’t bother until it was too late and it was frozen.
Also, my account was opened on a tourist Visa via an agent, so actually I’m not complaining.