just the correct you slightly Mark remember you’re not coming into Thailand with any Visa at all you were coming into Thailand visa exempt just so you have the terminology correct FYI
vickki has already stated by Brandon your monthly pension deposits don’t really mean anything you need to have 800,000 in the bank two months prior to your filing your first one year extension 
you’re wrong Banks are required to verify customers' identities and the purpose of their financial transactions to prevent them from being used for illicit activities.
maybe in fairytale land, but not in the real world do you have any idea how much illegal money is laundered through foreign banks. if you did, you would understand their concern.
The bank asked me for a certified copy of my passport to open an account about five years ago. I tried to get an appointment for notary at the Bangkok US Embassy had to wait for about a month to get in so I went to Chiang Mai US consulate and they had appointments available within about seven days so that’s how I got my certified copy of my passport, and I’m not sure but I think I may have had to get it. Translated as well.