Eligibility for the CDS update service is determined through the Address Sequence Service process described in the Domestic 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 FEBRUARY 2009 FULFILLMENT DELAY ANNOUNCEMENT
• CDS Information
• CDS Customer Web List
• CDS Qualification Requests (CDS Customers only - Login required)
• CDS No Stat Info
• CDS No Stat Counts

GUIDES

• CDS User Guide

FORMS

• CDS Application/Renewal Form
• CDS Web Access Request Form

CONVERSION SOFTWARE

• CDS Conversion Software (Windows)
• 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: RIBBS@USPS.GOV
Page updated: 12/03/2009