Flats Addressing Requirements
Effective March 29, 2009, new address placement and formatting requirements adopted by the Postal Service® for Periodicals, Standard Mail®, Bound Printed Matter, Media Mail®, and Library Mail flat-size pieces sent at automation, presorted, or carrier route prices, will be implemented. USPS® also adopts related revisions for automation and presorted First-Class Mail® flats. New requirements published in the Federal Register May 7, 2008.
New Address Requirements for Automation, Presorted, and Carrier Route Flat-Size Mail
Unenclosed Flat Addressing Example
Flats Addressing Tools & Resources
- Addressing Fact Sheet for First-Class Flats
- Addressing Fact Sheet for Periodical Flats [updated January 2009]
- Addressing Fact Sheet for Standard Flats
- Addressing Fact Sheet for Package Services
- New Address Standards for Commercial Flat-Size Mail Presentation [updated January 2009]
- New Address Standards for Flat-Size Mail Poster [download and print]