Thanks. They do require you to submit your passport when renewing a passbook or to do other things at the bank, so they can check it at the time. Bangkok Bank has always made photocopies of my passport for such transactions, and may also photocopy the visa page (I'm not sure however).
Bangkok Bank in Sa Kaeo requires one. The bank officer thumbed through a hefty manual of reference pages and found the list they have to use. It didn't help that I already had a Bangkok Bank account in Pattaya, and she also noticed that i don't have a TM30 for my last arrival April 1 (uh oh- fine to be paid)