Mailing Services Glossary of Terms

CASS Certification
Coding Accuracy Support System (CASS) improves delivery of your mail piece and maximizes postage savings by adding Zip+4 codes to your mailing list where possible. The CASS Certification process also helps determine certain address problems and standardizes addresses to Postal Service formatting. The correct Zip+4 allows us to apply postal barcodes to your mail pieces, qualifying your mail for Mail Class discounts.

Zip+4
The standard ZIP Code is a system of 5 digit codes that identify the individual post office or area delivery station associated with the address. The additional 4 digits identify a specific range of delivery addresses.

Barcodes
Barcodes are small vertical lines printed in the bottom right corner of the piece to be mailed - we call this area the clear space. Much like a grocery scanner, barcodes represent the numbers which make up the address and Zip+4 codes. These codes make it possible for the mail processing equipment to quickly process these pieces, lowering mail-processing and delivery costs. The savings are passed on to consumers through lower postage rates.

Clear Space
Area in lower right of a mailing piece where the address and barcode is printed. This area must be blank or with less than 10% ink density, to ensure machine readability and therefore be eligible for your desired mail service class. Refer to our "U.S. Mail Layout Guides" for more information and help in preparing your layout.

Ancillery Service Endorsements (such as Service Requests)
These are usually imprinted directions on a mail piece to tell the Post Office what to do with the piece if it becomes undeliverable, such as: Change Service Requested, Forwarding Service Requested, Return Service Requested and Address Service Requested. These are normally required on a First Class Presorted pieces.

Ink Jet Addressing
We use state of the art, high-speed, ink jet technology for accurate addressing and bar coding that meets or exceeds USPS addressing regulations. In addition our addressing equipment can print on aqueous coating. This scuff-resistant gloss coating enables your piece to resist scratches and marks as it travels through the postal system to have a better chance of arriving at

Phone: 770-795-8118  Fax: 770-422-1600

Roltime Fulfillment & Mailing  1330 Field Parkway  Marietta, GA 30066