New 42-day free trial Get it now
Smarty

Cass vs. NCOALink certification article now live

Cass vs. NCOALink certification article now live
Updated October 29, 2025
Tags
Cass vs. NCOALink certification article now live

We get a lot of questions about USPS CASS certification and how it differs from NCOALink certification. They are both methods of address validation that originate with the USPS. While they look the same and smell the same (probably), they are in fact, very different. Even still, these methods are frequently confused, conflated and equated. So, we decided to cut the confusion and answer all your burning questions about CASS and NCOALink.

Here is some of stuff that future you (who has read the article) already knows:

  • When you notify the USPS that your address has changed, NCOALink only hangs onto those updates for 4 years.
  • In order to use NCOALink you must submit a minimum of 100 addresses for validation at a time. 
  • To become CASS-certified, vendors must score 100% accuracy on 150,000 addresses for delivery point coding, eLOT (Enhanced Line of Travel), DPV or DSF2, RDI, and Perfect Address.

Learn all this and much more by checking out the Cass vs NCOALink article here. Future-you will be so proud!

Subscribe to our blog!
Learn more about RSS feeds here.
Read our recent posts
Smarty's January 2026 release adds parcel boundaries, provisional addresses, and smarter international geocoding
Arrow Icon
OREM, UT, Jan 27, 2026—Smarty®, an expert in address data intelligence, today announced a three-part release designed to help organizations turn messy, fast-changing location data into operational confidence. The January 2026 bundle introduces: 1) A brand-new parcel dataset, 2) Expands provisional address programs into core U. S. products, and 3) Upgrades Smarty’s International Geocoding engine—giving organizations more precision and more usable signals for automation at scale. “Address data is never ‘done.
Effective Slack communication: The Smarty way
Arrow Icon
Slack is incredible—until it becomes overwhelming, distracting, and hard to manage. Every company eventually reaches that moment when the friendly hum of collaboration turns into a full-blown notification blizzard. Messages pile up. Channels multiply like rabbits. Every ping feels urgent. Suddenly, your team’s deep-focus time feels like an optional side quest, not part of their job. At Smarty, we’ve lived this story. We’ve also learned how to fix it. Now we want to help other organizations create Slack environments that feel lighter, faster, and dramatically more supportive of real work.
Smarty customers avoid USPS rate limiting
Arrow Icon
TLDR: Smarty customers won’t feel a thing from the new USPS API restrictions because Smarty doesn’t depend on USPS’s real-time APIs to do address verification. We’ve always used our own, powerful, hyper-accurate data to back our tools and support client needs. While USPS is capping its address verification service at 60 requests per hour and retiring the legacy Web Tools API on January 25, Smarty keeps verifying addresses at full speed on our own infrastructure. We ingest USPS data updates monthly and run verification internally, so USPS API changes, rate limits, or even a temporary USPS outage don’t ripple into your workflows.

Ready to get started?