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
Provider data accuracy: Regulatory compliance and hidden network risks
Arrow Icon
Welcome to part one of our new blog series on provider location data—an exploration into the messy, high-stakes world of healthcare compliance, address accuracy, and network adequacy. To kick things off, we sat down with Dave Medlock, founder of Maven One Health and a contributing thought leader, to discuss why clean provider data is essential for achieving peak regulatory compliance and meeting requirements with ease, thereby avoiding serious consequences if it isn’t done correctly. Here’s what he had to say about understanding CMS, state DOIs, continuous audits, rosters, data decay, messy inputs, and the future of address data itself.
Always on; always Smarty: High availability design and engineering best practices
Arrow Icon
When the digital world falters, our goal is simple: stay steady for our customers. At Smarty, reliability isn’t a bragging point, but rather a promise. We’ve built a platform designed to keep running even when others stop, using a vendor-agnostic, redundant infrastructure grounded in engineering best practices that weather disruptions with quiet consistency. Our customers depend on uninterrupted address data services. And, we take that trust seriously. And because we trust you, we’re offering a 42-day free trial on every product.
Christmas traditions around Smarty
Arrow Icon
Around the world, people celebrate Christmas in all kinds of ways. In Iceland, it’s tradition to read books by candlelight on Christmas Eve. Christmas firework shows are a staple in El Salvador. Families in Australia often spend Christmas Day playing cricket. At Smarty, we keep the season bright with a few traditions of our own. From wacky holiday decorating to gingerbread house competitions, we love taking the holidays to the next level. So stick around; things are about to get festive. Our favorite Christmas traditions are:Seasonal service projectsUpside-down holiday decorUgly Sweater DayThe Great Gingerbread House Bake OffAddy the Address ElfYuletide karaokeLetters to SantaGift-wrapping extravaganzaSeasonal service projectsWe like to celebrate the season of giving by giving back! This year, we participated in United Way's Sub for Santa program, where families—or Smartys 😉—sub in for Santa by donating gifts to local families in need.

Ready to get started?