Abstract: A system for bar code error detection in large volume mailings against a print run which prints the bar code on a mail piece. The system checks the print quality of the bar code and compares it with pre-selected standards. The bar code is then decoded, and compared to a database in the computer to confirm that the bar code is valid. The system then prints out a report to certify the sampling, comparisons and error rate for all verification tests. The report may be used by the United States Post Office to expedite bulk mailing by a direct mailer.