摘要:
Rewritable labels 10 capable of erasing and writing information are used as a buying form I and shipping form O incapable of being falsified. Each rewritable label has a barcode 2 in which a serial number N is written in a mode incapable of being erased, and an erasable two-dimensional code 4 for writing commodity information. In the two-dimensional code 4 of the buying form I, supplier's commodity information and the serial number N of the buying form I are written in a mode incapable of being falsified. In the two-dimensional code 4 of the shipping form O, at least some of contents of the two-dimensional code 4 of the buying form I, new commodity information, and the serial number N of the shipping form O are written in a mode incapable of being falsified.