Abstract: A server apparatus includes: a communication unit that communicates with a first communication apparatus and a second communication apparatus; a registration unit that, upon obtaining identification data of a mobile terminal which has been lost from the first communication apparatus, registers the identification data; and an output unit that, upon obtaining position data and the identification data from the second communication apparatus, outputs the position data when the identification data is registered, the position data indicating a position of the second communication apparatus at the time when the second communication apparatus receives the identification data sent from the mobile terminal.

Abstract: Beacon transmits a beacon identifier “B1”. Server apparatus determines whether or not a condition for changing the beacon identifier “B1” is met. In the case where server apparatus has determined that the condition is met, communication terminal establishes communication with beacon and sends a change instruction instructing the beacon identifier “B1” to be changed to “B2” to beacon.

Abstract: A server apparatus includes: a communication unit that communicates with a first communication apparatus and a second communication apparatus; a registration unit that, upon obtaining identification data of a mobile terminal which has been lost from the first communication apparatus, registers the identification data; and an output unit that, upon obtaining position data and the identification data from the second communication apparatus, outputs the position data when the identification data is registered, the position data indicating a position of the second communication apparatus at the time when the second communication apparatus receives the identification data sent from the mobile terminal.

Abstract: A benefit awarding system includes a terminal device and a server device. The terminal device includes: a first acquiring unit that acquires a product identifier for identifying a product; and a first transmitting unit that transmits a user identifier indicating a user and the product identifier acquired by the first acquiring unit, in a case where this terminal device is positioned inside a shop. The server device includes: a first receiving unit that receives the user identifier and the product identifier transmitted by the terminal device; and an update unit that updates benefit information stored in a storage unit in association with the user identifier received by the first receiving unit, with information indicating benefits corresponding to the product identifier received by the first receiving unit.