I don't have health insurance so i need to show proof of money in a bank account.
As you were saying, i thought also about doctoring (or is it "redacting" in english ?) the account number, easily done with an editing software. But the number is not random and has to follow a precise pattern that can be verified if they decide to do so...Doctoring the account statement, even in a small way, could mean for them that the whole document is a fake, and visa being denied.