An apparatus for franking flat items of mail removed individually or at the underside of a supplied stack and guided in a transport direction at one side edge, includes a separating station formed from a feeder for items of mail separating device, and a downstream processing line of a franking machine, following in a conveying manner in the transport direction, for franking/printing the individual items of mail. The processing line in the transport region between feeder and the separating device of the separating station assigned to the latter includes a plurality of driven transport rollers which form a transport plane for receiving an item of mail or the respective lowest item of mail from a stack, which rollers are mounted in a frame in the transport direction of the items of mail transversely and beside one another and in the same direction and at the same peripheral speed.