Importance

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Abstract

A checkout machine in a store for performing a checkout process in a sales transaction, includes a network interface connectable to a transaction management server for managing a sales transaction in which a checkout process is performed with or without a checkout machine in the store; and a processor configured to: acquire, from the transaction management server, data of a sales transaction in which a checkout process is performed without any checkout machine in the store, and a first transaction code of the sales transaction, the first transaction code being issued by the transaction management server according to a first code scheme, issue a second transaction code according to a second code scheme that is different from the first code scheme, and control the network interface to transmit the data of the sales transaction and the second transaction code to an electronic receipt server.

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First Claim