A postage evidencing system for tracking postage amounts for multiple users comprising at least two register set partitions is disclosed. Each of the partitions includes an ascending register holding a number representing a value of postage that can be evidenced by the device, a descending register holding a number representing a value of postage that has been previously evidenced by the device, and an identification representing a source of mail pieces that are evidenced with postage from the partition. A security module limits access to the partitions and registers. The identifier for a selected partition is printed on mail pieces as part of an Information Based Indicia (IBI) to identify the source of the mail pieces.