What Address Quality tools are available to enhance my address list?
The USPS offers a wide range of products and services to help improve and maintain address quality. Currently, Early Warning System (EWS), LACS^Link ™, DPV™, and DSF2™ products are included within the CASS certification testing process. Ask your software provider or contact Customer Care at the National Customer Support Center (NCSC), in Memphis, Tennessee, for these and other available address quality tools.

Early Warning System (EWS) – EWS is a file that lists new street names by ZIP Code that are not yet available within the ZIP + 4 product. Today, the ZIP + 4 product is extracted from the Address Management System (AMS) approximately 30 days before its “official” release date. New streets that are activated after extract of the monthly ZIP + 4 product release are not accessible to address-matching products until a subsequent product release. If a valid address is updated with erroneous match results, the address will remain incorrect unless there is manual intervention. Published weekly, the EWS file prevents potential miscodes of new streets that are added to the ZIP + 4 database between the monthly scheduled updates.

LACS^Link – The LACS^Link product allows mailers to identify
an address that has been renumbered or converted by a municipality and provides the revised version of the address. For example, when 911 conversion necessitates changing rural-style addresses to city-style addresses.
Example: RR1 Box 123
Converted to: 123 ELM CHAPEL RD

DPV – The DPV product is an enhanced feature of CASS Certified address-matching software. It is available from all CASS Certified software vendors and allows mailers to confirm if an address is an accurate and valid delivery within the USPS delivery network.

DSF² – The DSF² system is another technology available, under license, from the USPS. DSF² helps mailers identify inaccurate or incomplete addresses. Using DSF² helps reduce the amount of undeliverable-as-addressed (UAA) mail. Its address coding processing function provides type of delivery, address characteristics, and carrier walk-sequencing information. DSF² also provides the Locatable Address Conversion System (LACS) information.

Will CASS Certified address matching software make my address list perfect?
Using CASS Certified address-matching software does not guarantee that your software will always produce the correct ZIP + 4 assignments. You may need to employ several different address quality tools to increase the accuracy of your mailing list. Analytical reports typically provided by CASS Certified software products should be utilized in a pre-production environment to further determine the quality of your address list. Reports can identify if the address was changed, and which addresses did not standardize or receive a ZIP + 4 assignment, as well as other valuable details about your address list. Consult with your software provider about these reports.

What level of discounts can I receive by using CASS
Certified software?
Postage discounts vary depending on mailing requirements for preparation and timeliness of list processing. The use of CASS Certified software is the first step in effectively managing your overall mailing costs and obtaining eligibility for postage discounts.

Can the USPS provide me with a list of alias names for
firms and businesses?
The Postal Service does not provide alias firm name lists or mailing lists of any kind. There are many types of mailing lists available commercially. Inquire with your CASS Certified software provider or a mail service provider.

How do I know which address matching software is
CASS Certified?
The Postal Service provides a current list of CASS Certified
products and vendors at ribbs.usps.gov/files/vendors.

Other USPS Resources
CASS Certified ZIP Code lookup tool
Click “Find a ZIP Code” at usps.com.

NCSC PS&P CD-ROM
Your guide to the Address Management Products, Services, & Publications available for mailers. The CD-ROM is full of useful product descriptions and contact information. Contact NCSC Customer Care to request your free copy.

CASS™ MASS™ Guidelines CD-ROM
A guide to the CASS certification process is available for all mailers. Contact NCSC Customer Care to request your free copy.

Locate your local AMS office
At usps.com/ncsc/lookups/ams_office_locator.html Contact your local AMS office for assistance when you have addresses with street spellings that are different from the USPS database.

Publication 28, Postal Addressing Standards
pe.usps.gov

Publication 363, Updating Address Lists is a Smart Move
usps.com/cpim/ftp/pubs/pub363.pdf
For further information please contact the NCSC.

Customer Care 800-238-3150, option zero
CASS Dept. 800-642-2914
Fax: 901-681-4440
cassman.ncsc@usps.gov

NATIONAL CUSTOMER SUPPORT CENTER
UNITED STATES POSTAL SERVICE
6060 PRIMACY PKWY STE 201
MEMPHIS TN 38188-0001