TOOLS
CASS™
CASS™ (Coding Accuracy Support System) with DPV, LACSLinks, & SUITELinks improves the accuracy of postal codes and carrier route codes.
Instantly verify that customer shipping and billing addresses are accurate with CASS™
Our CASS™-certified processing ensures your addresses meet USPS standards for accuracy and deliverability. Seamlessly integrate with eCommerce platforms, CRM, customer service systems and more. Get real-time validation of customers’ addresses and data that enables any application to get the right information at the right time.
This certification validates that addresses are standardized and corrected, qualifying you for postal discounts and reducing delivery issues.
The following trademarks are owned by the United States Postal Service® : CASS™

Improve Deliverability
The Coding Accuracy Support System (CASS) is designed to standardize addresses to the latest USPS standards and information allowing for the proper assignment of ZIP, ZIP+4, and Delivery Point (DP) information.
Only CASS validated addresses can then be processed through subsequent processes to perform additional address quality related operations.
CASS focuses on confirming an address to a known range of addresses. For example, CASS data knows that there are addresses from 10-100 on MAIN ST, or that there are PO BOX values from 100-200. CASS will standardize the street address information by adjusting the address to proper formatting and abbreviations.
While CASS validates to a known range of valid addresses, Delivery Point Validation (DPV) checks the specific address to determine if it is valid for mail delivery by the USPS and/or if there is an issue with the secondary address information (such as, the apartment or suite number is missing or invalid).
LACSLink applies the Locatable Address Conversion System (LACS) data to the CASS coded address. There are situations where addresses are renumbered and/or the streets are renamed. LACSLink works to identify those impacted addresses and provide the new, correct address.
SUITELink applies to business addresses only where the CASS/DPV process identified missing of invalid secondary address information. SUITELink utilizes the Business Name along with the address to attempt to identify the secondary address information where the USPS deliver the mail for that Business. Having the correct secondary address information facilitates mail deliverability and increases the ability to match to Change of Address information when a business moves.
Explore CASS™ Resources
Learn more about CASS™ and GrayHair’s other address data quality cutting-edge tools to ensure your address data is accurate and up-to-date.
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