Question 1

What is NCOA mailing list processing?

Accepted Answer

NCOALink (National Change of Address) processing updates your mailing list with address changes filed with USPS in the past 48 months. It is required to qualify for USPS automation postage discounts and significantly reduces returned mail.

Question 2

What is CASS certification?

Accepted Answer

CASS (Coding Accuracy Support System) is a USPS program that standardizes and validates mailing addresses. CASS-certified processing is required to qualify for automation postage discounts and ensures your addresses are deliverable.

Question 3

How often should I clean my mailing list?

Accepted Answer

USPS data shows approximately 14% of Americans move each year. A list that is 12 months old without NCOA processing may have 10–15% undeliverable addresses. We recommend cleaning your list before every major mailing campaign.