Patent ID: 6990683

Claim:
An information providing method using a first data holding device capable of holding data containing personal information identifying at least users and a second data holding device capable of holding data containing information identifying providers which provide at least products or services, the method comprising the following steps of: transmitting data of the second data holding device from a communication terminal device, wherein the communication terminal device is a cellular telephone; receiving data of the second data holding device and performing predetermined collation thereof, and upon obtaining positive collation results, transmitting a transaction processing continuation signal to the communication terminal device; transmitting data of the first data holding device, wherein transmitting the data occurs via a cellular telephone network; and performing, upon receiving said transmitted data of said first data holding device, predetermined processing based on the data, and holding at least processing data, wherein, in the data transmitting step of the first data holding device, identification information of the first data holding device is transmitted in addition to the data, and in the processing data holding step, collation of the identification information is performed, and in the event that positive collation results are obtained, predetermined processing is performed based on the data of the first data holding device.