What banks you think can do that?Yes they do. All of them af "source of funds" incorporated in their banking application. Anyway not many of them require any certificate of proof that may help you actually.
There are a few European banks and offshore banks that don't require any further certification!What banks you think can do that?
Correct, so it isn't really a problem as of now!But isn't it just something I have to write on a application? I mean everyone can write something?