touchback - (American football) a play in which the opposing team has kicked the football into your end zone.
From Wikipedia, the free encyclopedia. A check digit is a form of redundancy check used for error detection on identification numbers, such as bank account numbers, which are used in an application where they will at least sometimes be input manually. It is analogous to a binary parity bit used to check for errors in computer-generated data.
Check routing number location varies, and in some cases, like with some computer-generated payroll checks, the routing number and account number are not separated, and are instead printed in sequence. In those cases, the check routing number is always the first nine digits of any numerical sequence printed on a check.