PROBLEM TO BE SOLVED: To prevent a fraudulent deal using a novel mechanism that is free from an existing concept.;SOLUTION: Included are an origination device 4 to which inherent identification information is assigned and which can communicate with an access terminal, and fraudulent deal prevention equipment 1 that includes a processing unit 11 that, when being connected to any of access terminals 3a to 3n for the first time, registers the identification information that is inherent to the origination device and acquired from the origination device, which has a connection with the access terminal established, via the access terminal, and that, when the access terminal is connected next or thereafter, decides whether the identification information has already been registered, that, if the identification information has not bee registered, transmits a short mail, which guides to a response screen image for checking an intention of doing a deal unless an owner of a registered telephone number of a portable cellular phone of a person who does a deal is changed, displays on the screen that a verification mail has been transmitted to the portable cellular phone of he person who does a deal, and that, if no response is returned to the intention verification mail within a predetermined time, suspends the deal and displays in a screen image of the access terminal that the deal has been suspended.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT
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