A sales management device includes a communication interface and a processor. The communication interface is configured to communicate with a mobile terminal on which a user registers purchases and a clerk terminal within a store. The processor is configured to acquire terminal identification information set for the mobile terminal, acquire status information indicating an operating status of the mobile terminal identified by the terminal identification, acquire a communication connection state of the mobile terminal, and outputs the terminal identification information to the clerk terminal in response to (i) the communication connection state of the mobile terminal being unconnected and (ii) the status information of the mobile terminal acquired before the communication connection state of the mobile terminal becoming unconnected indicating a non-checkout status.