Certification Programs  
Evaluation, grading & certification services.
The United States Postal Service, in cooperation with the mailing industry, developed certification programs to evaluate the accuracy of software and equipment offered by Vendors and Licensees that provide mailing related services to customers.

CASS™ System - Evaluates address-matching software and improves the quality of ZIP+4®, CRIS, and five-digit coding accuracy.

Delivery Confirmation™ Service - A cost-effective, efficient means of obtaining delivery information for commercial mailers and retail customers.

MAC Batch™ - Evaluate USPS® manifest/presort mailing products manufactured by software developers to determine whether the mailing software accurately calculates postage for non-identical piece mailings .

MAC™ System & MAC Gold™ System - Evaluates USPS manifest mailing products manufactured by vendors to determine software accuracy in listing and calculating postage for identical- and/or nonidentical-weight permit imprint mailpieces.

Mailpiece Quality Control (MQC) - A self-study course designed to train mailers to develop mailpieces that meet the USPS goal of 100 percent automation compatibility.

MASS™ System - Evaluates the ability of MLOCRs, RVE systems, and encoding stations to process address information and apply an accurate delivery point barcode.

PAVE™ System - Evaluates the accuracy of presort software in sorting address files.

Presort Accuracy Grading and Evaluation (PAGE) - Evaluates the accuracy of publications and print planning (ppp) software in calculating virtual copy weight and percentage of advertising.

Certified Vendors and Licensees - A list of licensees and vendors that have been certified through CASS and MASS address matching software.

Zone Analysis Program (ZAP) - Assists mailers in determining the proper postage to apply to Periodicals mailings.