Effective January 27, 2013, there will be a change in how single-piece commercial residual First-Class Mail® letters are reported on PS Form 3600-FCM, Postage Statement - First-Class Mail. The pricing structure for presorted and automation First-Class Mail letters retains the change implemented in 2012 for the minimum postage charge to be that for a 2-ounce letter, and extends the concept to commercial residual piece letters that are part of the same mailing job and presented at the same time as the presorted and/or automation mailing. The reason for this change is to minimize extra sorting for commercial residual prices and allow for a uniform price for both 1-ounce and 2-ounces for commercial residual First-Class Mail letters. There is no change to the physical handling of the mailpieces. Complete information on the reporting and mail makeup of First-Class Mail residual letters can be found on RIBBS under Important Links on the Latest News page.