| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent validation of a return-processed merchandise in a validation waiting-state.SOLUTION: A merchandise sales data processing device transmits certification data of a value card to a server when sales-processed merchandise sales data includes sales data of the value card that requires the certification data certifying that a merchandise has been normally sold when selling to be transmitted to the server. If the server does not approve validation request responsive to transmission of the certification data, the device repeats retransmission of the certification data until the validation request is approved. The device terminates the retransmission of the certification data when the return-processed merchandise sales data includes the data of the value card for which the retransmission of the certification data is repeated.</p> |
