Question

Each check should be identified by its

AAB number.
MBA number.
CPA number.
ABA number.

Answer 1

Each check should be identified by its ABA number.

ABA stands for American Bankers Association. ABA number is located at the upper-right hand corner of each check. It is the small fraction printed in said location.

Part of the ABA number is also included in the MICR code on the lower left side of the front of each check.