A substrate is provided, which has a pattern of voltage supply vias extending through at least a portion of the substrate. The jig main body has: on one surface thereof a plurality of supporting projections to support the close contact layer; and also has, along an outer peripheral portion of said one surface, a side wall which is of substantially the same height as the supporting projections. The transaction numbers can be generated just prior to being used, minimizing the amount of time during which they can be lost or stolen.