| 摘要 |
PROBLEM TO BE SOLVED: To issue a post-receipt of the same contents as a sales receipt, which has sales data related to commodity sales register, while preventing the wrong. SOLUTION: A post-receipt R3 where sales data Z are printed but authentication data are not printed is issued separately from the sales receipt where at least sales data related to commodity sales register and authentication data are printed. Thus, only one sales receipt to which authentication data are added is issued to prevent the wrong, and the post-receipt R3 which has sales data Z related to commodity sales register can be issued.
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