System and method for printing indicia on mailing items, such as envelopes, cards, or label media, has a host computer system connected to a postal security device. The postal security device stores postage funds and, responsive to the host computer postage requests, provides data to the host computer representing an IBI Lite barcode having at least part of a unique authentication code. The host computer utilizes such data to produce print data representing postage indicia, and send such print data to one of a mailing machine, stand-alone printer, or printing system, for printing on a mailing item to be associated with the authentication code. A plurality of host computer systems each with their respective PSD may be provided. A reset computer system can communicate with each PSD, via their respective host computer, to provide additional postage funds and to receive information representing transaction data stored in the host computer.