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

Who is DPV® for?

DPV® is for customers who have to confirm if a ZIP + 4 address is a USPS delivery point.

First Class Mail

First Class Mail





Standard Mail

Standard Mail

Latest Updates

07/23/2024 Licensing Fees


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 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.

What does DPV® do?

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.

To become a licensed DPV® provider, applicant must be or in the process of becoming a CASS™ software manufacturer.

Annual License Fee: $17,700.00*

* 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.

Featured Resources

Applications/ Forms
Licensing and Certification Key Personnel Form for DPV®

This document contains information on licensing and certification key personnel Form for DPV®.

Applications/ Forms
DPV® Product Interface Application (PDF)

This document contains the product interface application form for the DPV® product.

Contact Lists
DPV® Licensees

This document provides a contact list of licensees for DPV®.

Applications/ Forms
DPV® License Agreement

This document contains the License Agreement for DPV®.

Fact Sheets
Licensing Fees

This document contains information about licensing fees for USPS® Licensed Products.

Modifications to DPV® License and Supporting Documents

This document lists modifications to the DPV® license agreement and supporting documents.

Tech Guides
Advertising Technical Guide

Advertising technical guide for licensed products.

User Guides
DPV® Product Licensee Performance Requirements - CASS Cycle O

This document provides product licensee performance requirements for DPV®.

User Guides
DPV® Product Licensee Performance Requirements

This document provides product licensee performance requirements for DPV®.

DPV® Archived Announcements

Release Notes
Updated REST Web Services Documentation

The Electronic Product Fulfillment (EPF) REST Web Services document has been updated to include both USPS® and Akamai server calls.

Release Notes
PO Box™ Throwback Table in the DPV® Product

In an effort to facilitate and grow the packaged‐service business, the USPS® has made the decision to include the PO Box Throwback table in the DPV and AMS API Products.

Fact Sheets
Door Not Accessible (DNA) & No Secure Location (NSL) Tables

In addition to verifying USPS® delivery points, the DPV and DSF2 Products have added two additional hash tables to assist mailers in streamlining delivery to reap the benefits of deliverable mail.

Licensing Announcement: Issue with Downloading Both SHA-1 and SHA-256 Products on Electronic Product Fulfillment (EPF)

This announcement details an issue with downloading both the SHA‐1 and SHA‐256 versions of the products using the SOAP Web Services (ColdFusion).

Licensing Announcement: SHA-256 Products on Electronic Product Fulfillment (EPF)

To comply with the recommendations from the December 2014 Office of Inspector (OIG) audit of the NCOALink® program, the USPS® will begin the transition from SHA‐1 to SHA‐256 technology as the method for data encryption.

Licensing Announcement: Reminder on Electronic Product Fulfillment (EPF) Server Migration

As a reminder, the Electronic Product Fulfillment (EPF) website will be migrated to a new server Saturday, March 15.

Licensing Announcement: Reminder on Electronic Product Fulfillment (EPF) for Large Files Beta Test

This licensing announcement serves as a reminder that the EPF for Large Files beta test concludes on Saturday, June 15, 2013.

Licensing Announcement: DPV®/DSF2® Files to Support Hurricane Sandy

To support addresses impacted by Hurricane Sandy, the USPS® is providing vacant and no-stat information via a weekly download from the Electronic Product Fulfillment (EPF) website.

DPV® PBSA Records

Effective with the August release, the USPS® has included the PBSA (Post Office Box Street Address) records in the following products.

DPV® CMRA Table Expansion

Effective with the February release of the DPV® monthly data fulfillment, P.O. Box™ (PBSA) records will be added to the CMRA table.

Licensing Announcement: DPV®/DSF2® Header Files

DPV and DSF2 Products currently have a very limited header file called month.dat which only contains the product month.

DPV® License Responsibilities Letter

If you sublicense your CASS™ Certified address matching software to a third party for their use to create their own customized product, their compliance with the DPV™ license terms and conditions remain your responsibility.

Letter to CASS™ Vendors

The USPS® Address Management office has determined that there is a small percentage of addresses that will produce a false positive match when presented to the DPV™ Split File Product.

Related Products


DSF is an approved method outlined in the Domestic Mail Manual for sequencing mail pieces in walk-sequence when not using a simplified address.


For more information about DPV® or the licensing and certification process, please call the Move Update Support Department at 1-800-589-5766.