Qualified Address Resource Library

US Postage Rates - Current USPS postage rates for First-class Mail and Standard Mail. Includes automation and Nonautomation (presort) rates.

Useful Terms and Definitions - Definitions for terms commonly used in the mailing industry.

USPS List Maintenance Recommendations - Recommendations from the United States Postal Service for maintaining address lists.

What is CASS Processing? - Learn more about CASS Processing, including what CASS Certification is and why it is important for mailers.

Preparing Your List for Processing with Qualified Address - Some helpful tips for preparing your list before importing into the Qualified Address software.

What is Address Verification & Standardization? - Find out what the difference between address standardization and address verification.