What should I do if I get a new passport while dealing with banks and immigration in Thailand?

If you ever have the situation that you enter formalities with banks immigration etc and during their deliberations you get a new passport, do keep photocopies of the original or the old one. They dont care if its you and you are the same person and the old passport is no longer valid they want photocopy of the old one.

Luckily I had a copy of the old one.

Also dont.think a stamp stating you have your visa in the passport is proof enough you have a visa they want the original copy of letter you presented at immigration when you arrived so they can really get down to it 😉

I guess its just crossing the Ts and dotting the i to the nenth degree.