The Computerized Delivery Sequence (CDS) program provides updated delivery sequence information on customer-provided address lists.

Eligibility for the CDS update service is determined through the Address Sequence Service process described in the Domestic

Important Links

• What is CDS?
• CDS User Guide
• New Fax Number
• Frequently Asked Questions
• CDS Products on EPF

Mail Manual (DMM) 507.

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

• Accurate complete addresses
• Reduced undeliverable-as-addressed mail
• Increased deliverability
• Access to walk sequence saturation discounts

CDS Links:

ANNOUNCEMENTS & INFORMATION

• CDS Information
• CDS Customer Web List
• CDS No Stat Info
• CDS No Stat Counts

GUIDES

• CDS User Guide

FORMS

• CDS Application/Renewal Form
• CDS Renewal Web Access Request Form
• Delivery Unit Summary (DUS)

CONVERSION SOFTWARE

• CDS Conversion Software (Windows)
• CDS Conversion Software (Windows7)
• CDS Conversion Software User Guide (Windows)
• CDS Conversion Software Instructions (Windows)
• CDS Conversion Software (Linux)
• CDS Conversion Software (Unix-Sun32)
• CDS Conversion Software User Guide (Linux-Unix-Sun32)

SAMPLES

• CDS Sample ZIP Code
• CDS Sample ZIP Code Password

OTHER LINKS

• Electronic Address Sequence Service (EAS)

To obtain additional information about CDS, contact the National Customer Support Center at 800-238-3150.

Contact Information:

• CDS
• Phone: 800-238-3150
• Email: CDS.NCSC@USPS.GOV
• Page updated: 04/08/2016