New Rules for Addressing Flat Mail
Posted November 19, 2008

On March 29, 2009, the USPS will implement new address placement and formatting requirements for Standard Mail (including Non-Profit), Periodicals, Bound Printed Matter, Media Mail, and Library Mail flat-size pieces sent at automation, presorted, or carrier route prices. Also, the USPS will adopt related revisions for automation and presorted First-Class Mail flats. These changes are the result of the USPS’s new Flats Sequencing System (FSS), which will automate delivery sequencing for flat-size mail. To help mailers, the USPS has published four fact sheets, which now are available right here for your convenience.

Standard Mail Fact Sheet. Click here
First-Class Flats fact sheet. Click here
Periodicals fact sheet. Click here
Bound Printed Matter, Media Mail and Library. Click here
Federal Register (May 7, 2008) notice. Click here