If your business sends out physical mail—whether it’s for marketing, billing, or shipping—then you’ve likely encountered delivery issues at some point. Mail returned, delayed, or delivered to the wrong address can mean missed opportunities and lost trust. That’s where CASS codes come into play.
If your business sends out physical mail—whether it’s for marketing, billing, or shipping—then you’ve likely encountered delivery issues at some point. Mail returned, delayed, or delivered to the wrong address can mean missed opportunities and lost trust. That’s where CASS codes come into play.
CASS, which stands for Coding Accuracy Support System, is a system developed by the United States Postal Service (USPS) to improve the accuracy of address data. It’s not just a technical tool—it’s a way to ensure every mailpiece gets where it’s meant to go, the first time.
Think of CASS codes as a validation process that helps standardize and verify addresses. The software checks your list against the USPS database to correct formatting errors, fill in missing data like ZIP+4 codes, and ensure the address actually exists.
When you use a CASS-certified system, your mail is more likely to qualify for postal discounts because you’re saving the USPS time and effort.
Here’s what a non-standard vs. a CASS-certified address might look like:
| Before CASS Processing | After CASS Processing |
|---|---|
| 123 main st, apt 5b | 123 MAIN ST APT 5B, NEW YORK NY 10001-1234 |
| 789 Elm, chicago il | 789 ELM ST, CHICAGO IL 60610-4422 |
The shift to remote work has changed how businesses communicate—digitally, yes, but also physically. Many companies still send onboarding packets, branded welcome kits, and legal documents to remote employees or clients. When those addresses aren’t accurate, it doesn’t just create a hassle—it reflects poorly on your brand.
Jessica L., a remote HR coordinator, shared her experience:
“We sent out ten welcome kits to new hires across five states. Three came back undeliverable due to simple address formatting errors. That was an eye-opener. We now verify every address through a CASS system before printing a label.”
Mistakes like this aren’t rare, and they add up quickly in time and cost.
Beyond the immediate frustration, inaccurate addressing can cause:
Accurate address data ensures your resources are used efficiently and your operations run smoothly.
bettrdata offers a modern, straightforward way to incorporate CASS-certified processing into your workflow—without overcomplicating things. Whether you're syncing customer data from a CRM or preparing a bulk mailing, bettrdata helps ensure the addresses are USPS-compliant from the start.
The platform focuses on clean, reliable data. It’s built for teams who want less manual cleanup and more confidence in their outreach, whether they’re mailing one letter or ten thousand.
One of bettrdata’s clients, a growing startup with a distributed workforce, reported a 28% decrease in returned mail after running their onboarding addresses through the platform.
Explore how bettrdata works: https://www.bettrdata.com
By cleaning this data in real time or as part of a scheduled process, businesses prevent these issues from ever reaching the print queue.
CASS processing isn’t just for mailrooms or logistics departments. It’s useful any time you collect addresses. Consider integrating it into:
The best practice is to validate addresses at the point of entry, rather than waiting for issues to crop up later.
People don’t like filling out forms—especially long ones. With CASS-enabled auto-complete and real-time validation, users enter less and get more accurate results. That leads to:
It’s a small technical change that can improve customer satisfaction and internal operations.
While bettrdata streamlines the process, you can also explore USPS-certified tools that support batch and API-based address validation. One such resource is the USPS Address Information API. It offers developers a direct way to validate address data in real time.
For teams without technical expertise, solutions like bettrdata offer a no-code way to achieve the same results—meaning you don’t have to rely on engineering to keep your data clean.
CASS codes aren’t just for bulk mailers or enterprise operations. They’re for any team that wants their physical communications to be efficient, professional, and on time.
With remote work blurring geographic boundaries, address accuracy isn’t just logistics—it’s brand reliability.
If your team is still struggling with returned packages, onboarding delays, or lost documents, it might be time to take a closer look at how your addresses are processed. CASS codes—and platforms like bettrdata—make it easy to get it right the first time.