Sales: 800-220-8111

National Change of Address & CASS

Over 40 million Americans change addresses annually, significantly reducing the quality of your mailing list. Now you can ensure that your data is accurate and up-to-date with our National Change of Address (NCOA) service. NCOA can substantially reduce undeliverable and duplicate mail pieces by identifying and correcting addressing errors before they enter the mail stream. Your records are compared against the NCOA database to ensure they have the most current addresses and are updated with ZIP+4 certification according to US Postal Service standards.

person using computer

According to the US Post Office

  • In a recent year, over nine billion pieces of mail were Undeliverable as Addressed (UAA).
  • 75% of undeliverable mail could be fixed by running NCOA prior to the mailing.
Having the correct address ensures that your mailings reach all of your supporters, maximizing your fundraising success!


  • Reduce undeliverable mail
  • Improve delivery time
  • Increase mailing’s response time
  • Reduce duplicate mail pieces and re-mailings
  • Receive discounted postage rates
  • Reduce employee data entry
  • Meet the USPS NCOA update standards
  • Save money!


  • Data formatting to prepare records for processing
  • Addresses are updated, and the ZIP+4 Code is standardized
  • CASS Automation Discount Qualification
  • Report breakdown of deliverable/undeliverable address information
  • Receive discounted postage rates
  • Reduce employee data entry
  • Data importing of updated records into your existing data files

Service Includes

  • Your data is formatted for processing.
  • ZIP+4 codes are added and/or certified.
  • Records are compared against the NCOA database.
  • Reports indicating all data updates as well as records that still contain inaccurate information.
If you have Canadian donors in your database, we offer this same service for them. Please visit

Learn more:

Contact your DonorPerfect account manager at (800) 220-8111.