Computerized Delivery Sequence (CDS)

The CDS program provides updated delivery sequence information on customer-provided address lists.

Please note: Links to many of the documents on this page are temporarily on the bottom left of this page. They will be returned to their normal place soon.

Who is CDS for?

Eligibility for the CDS update service is determined through the Address Sequence Service process described in the Domestic Mail Manual (DMM) 507.

First Class Mail

First Class Mail



Standard Mail

Standard Mail



Customers qualifying for CDS will benefit from the use of the CDS file through:

  • Complete and accurate addresses
  • Reduced undeliverable-as-addressed mail
  • Increased deliverability
  • Access to walk sequence saturation discounts
  • Ability to identify addresses marked as vacant or seasonal

The CDS product is distributed to qualified customers on a bi-monthly or weekly basis.

To establish a CDS account, customers must complete the CDS Customer Application and Web Access Form. Mail or fax (650-357-6741) the completed forms to the CDS Department at the NCSC.

Featured Resources

Fact Sheets
Computerized Delivery Sequence (CDS) Brochure

The Computerized Delivery Sequence (CDS) program provides updated delivery sequence information to qualified mailers.

Applications/ Forms
Computerized Delivery Sequence (CDS) Application/Renewal Form

This document contains the application and renewal form for CDS product.

Fact Sheets
Computerized Delivery Sequence (CDS) Products on Electronic Product Fulfillment (EPF)

Beginning October 2014, all Address Quality and Address Management products will be provided via the Electronic Product Fulfillment (EPF) method.

User Guides
Computerized Delivery Sequence (CDS) User Guide

This document contains a user guide for CDS.

Computerized Delivery Sequence (CDS) FAQs

This document provides frequently asked questions (FAQs) and answers for the CDS product.

Related Products

Electronic Address Sequencing (EAS)

EAS provides an electronic option for processing address files for sequencing and/or qualification for Computerized Delivery Sequence (CDS).


For more information about CDS, contact the National Customer Support Center at 1-800-238-3150 or email