Every day, identification numbers are presented over the telephone, recorded onto documents, typed or scanned into computers, sent via the internet, or transmitted in some other fashion Each time this happens, there is a chance that one or more digits in the number will change or be rearranged as they move from one location to the other For example, the UPC 0-53600-10054-0 on a product could be scanned into a computer as 0-53600-10059-0 or 0-53600-10045-0 In either case, an error in the number has occurred In addition, less than honest individuals sometimes attempt to forge identification numbers (e.g, credit card numbers) for personal profit