PS Form 3600-FCM, Postage Statement - First-Class Mail is a form you complete when sending a mail piece through First-Class Mail (FCM) or First-Class Package Service. The statement - also known as the USPS Form 3600-FCM - is issued by the United States Postal Service (USPS). The latest version of the document was released on January 1, 2019. A printable PS Form 3600-FCM version can be downloaded below or found on the USPS Forms website.
This document has two more related forms within the same series: the PS Form 3600-EZ, Postage Statement - First-Class Mail - Easy - Nonautomation Letters, Cards, or Flats and the PS Form 3600-PM, Postage Statement - Priority Mail - Permit Imprint. The first form is used for non-automation postcards, letters, and flats sent through the First-Class Mail service. The second one is filled out when sending a mail piece via Priority Mail service.