Dead Mail —Mail that is undeliverable as addressed and cannot be returned to the sender (usually because there is no return address on the piece).

 

Delivery Point Barcode (DPBC) —A POSTNET barcode that consists of 62 bars with beginning and ending frame bars and 5 bars each for the nine digits of the ZIP+4 code, the last 2 digits of the primary street address number (or Post Office box, etc.), and a correction digit. The DPBC allows automated sortation of letter mail in carrier walk sequence.

 

Delivery Sequenced Mail —Mail that is arranged by a mailer in delivery order for a particular carrier route. This mail requires no primary or secondary distribution.

 

Destination Area Distribution Center (DADC) Price —A price available for Periodicals mail that is prepared and entered by the mailer at the area distribution center (ADC) that serves the delivery address on the mail.

 

Destination Delivery Unit (DDU) Price —A price available for Periodicals, Standard Mail, Parcel Select, and Bound Printed Matter that is properly prepared and entered by the mailer at the delivery unit that serves the delivery address on the mail.

 

Destination Network Distribution Center (DNDC) Price —A price available for Standard Mail, Parcel Select, and Bound Printed Matter that is properly prepared and entered by the mailer at the NDC or other designated postal facility that serves the delivery address on the mail.

 

Destination Sectional Center Facility (DSCF) Price —A price available for Periodicals, Standard Mail, Parcel Select, and Bound Printed Matter that is properly prepared and entered by the mailer at the sectional center facility (SCF) or other designated postal facility that serves the delivery address on the mail.

 

Detached Address Label (DAL) —Paper or cardstock used to carry address information when preparing a mailing of unaddressed Periodicals flats, Standard Mail flats and merchandise samples, and Bound Printed Matter.

 

Detached Mail Unit (DMU) —An area in a mailer’s facility where postal employees perform mail verification, acceptance, dispatch, and other postal functions.

 

Direct Mail —Another name for advertising mail sent to targeted markets. It can be any mail class, but it is usually Standard Mail.

 

Dimensional Weight —Postage for Priority Mail packages addressed for delivery to zones 5-8 and exceeding one cubic foot (1,728 cubic inches) is based on the actual weight or the dimensional weight, whichever is greater.