Yesterday I went to Bangkok Bank to try to get a bank statement. I did not have my current passport but I did have a cancelled passport and a Thai Driver's License, the bank refused my request.
What happens when you loose your passport? How do people get bank statements?
TLDR : Answer Summary
If you've lost your passport and need to obtain a bank statement in Thailand, it's essential to first get a new passport. Ensure you update your banking records with the new passport as banks require a current passport to verify your identity when processing requests. In the meantime, you can also access your statements via the bank's app. Some users have suggested that the acceptance of alternative documents, such as a Thai driver's license, can vary depending on bank policy and staff discretion.