Check control digits bank account number

It would be nice that our systems also performs a basic check on the bank account number entered. The logic in the Belgium system is that the last 2 digits should be the mod 97 of the number represented by the other relevant digits.

E.g. account number BE00 0000 0000 00AB

You drop the part with BE00. You take away the last 2 digits (represented by AB). The mod 97 of the other numbers should be equal to AB.

Just a wishlist thing but it might prevent typo's.