Wafer Seal Guidelines

Effective January 5, 2013 the USPS has issued new guidelines for Folded Self-Mailers (FSM). FSM and specific non-envelope pieces must be designed to meet the new standards in order to receive automation letter discounts.

 

Detailed information with helpful diagrams from the USPS can be found by clicking the following link:

 

https://ribbs.usps.gov/fsm/documents/tech_guides/FSMReference.pdf