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The DPV Product identifies whether a ZIP + 4® coded address is currently represented in the USPS® delivery file as a known address record. The DPV Product allows users to confirm known USPS addresses as well as identify potential addressing issues that may hinder delivery.


Correcting potential addressing issues can reduce the amount of undeliverable-as-addressed (UAA) pieces, which in turn will result in more efficient mail processing and delivery.

The DPV Product confirms that:

  • The known address has verifiable primary and secondary data.
  • The known address has verifiable primary but not secondary data.
  • The address cannot be verified as a known address.
The DPV Product does not append any missing data or correct any address elements.

Effective August 1, 2007, CASS Certified™ software requires use of both the DPV and LACSLink® products when processing address lists. This requirement ensures ZIP + 4 codes will be assigned only when the primary number of the address can be validated using the DPV Product, and whether the input address reflects any municipality conversions.

To become a licensed DPV provider, applicant must be or in the process of becoming a CASS™ software manufacturer. If applicant is interested in becoming a CASS software manufacturer, contact the CASS™/MASS™ Department at 1-800-642-2914.

Annual License Fee: $11,750.00*
* The initial licensing year is prorated.

What's next?
Once you have decided to apply to become a DPV licensee, the next step is to complete the certification process. The process includes the completion of the following documentation:

  • Application
  • Confidentiality Statement
  • Self-Certification Survey
  • Key Personnel Listing
  • Equipment/Software Product Information

Upon completion of these documents, the license must be executed, including the payment of licensing fees.

If you have any questions regarding the licensing and certification process, please call the Move Update Support Department at 1-800-589-5766.

Contact Information:







1-800-238-3150

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