To continue the reception of profit from a service provider in the case of coincidence and to disable the acquisition of profit in the case of noncoincidence by judging the coincidence of member's data and existence area data.

A personal authentication system reads the member's data through a member's data reading means. A service provider AA reads existence area data D2 of PHS terminal equipment 20 from the output of PHS entrepreneour PP through an existence area data possessing means. An arithmetic means judges the coincidence of member's data previously stored in a storage means and the existence area data D2. In this case, when a member user has his own PHS terminal equipment 20 at his hand, the arithmetic means judges that the member's data are coincident with the existent area data D2. When the arithmetic means judges that the member's data are not coincident with the existent area data D2, the person who starts communication can not acquire the profit from the service provider AA.