Address List Sequencing Service is a manual process that is a prerequisite to the electronic process of list sequencing, Computerized Delivery Sequence (CDS). Address List Sequencing is a service provided to mailers who have mailing lists containing at least 90 percent-but not more than 110 percent-of the total possible deliveries in a 5-digit ZIP Code™ area. The Postal Service receives cards from the mailer containing mailing addresses and sequences the addresses in delivery order. The mailer can then place mail in sequence and present it to the Postal Service as carrier-ready mail.

The Postal Service does not compile mailing lists: Address List Sequencing is designed primarily for use in high-density or saturation mailings to a particular area for mailers who already maintain a list. The following levels of address sequencing are available:

• Sequencing of address cards (DMM 507.7.3.9)
• Sequencing of address cards, with blank cards added for missing adresses (DMM 507.7.4)
• Sequencing of address cards, with cards added containing missing and new addresses (DMM 507.7.5).

Customers are expected to incorporate the changes in their mailings within 75 days after they receive the sequenced cards.

Address List Sequencing provides mailers:

• Cleaner mailing lists
• Reduced handling of mail due to the elimination of non-deliverable mailpieces
• Increased revenue potential due to addresses added to mailing lists
• More timely and consistent delivery

For more information about Address List Sequencing Service, contact the National Customer Support Center at 800-238-3150.