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.
Finding the Routing Number on a Check. 1  1. Look in the lower left hand corner of the check. 2  2. Look for an icon on the check. 3  3. Identify the first nine numbers.  4. Confirm your routing number by using 1  symbols. 5. Examine the first digit of your routing number.