Advanced Facer Canceler System with Optical Character Reader (AFCS/OCR) A machine with many components that culls, faces, and cancels through a series of automated operations First-Class Mail lettersize pieces received primarily from collection mail. The machine first culls or removes pieces that are too thick, too stiff, too long, or too tall. It then reads… Continue reading Advanced Facer Canceler System with Optical Character Reader – USPS Definition