Abstract: An object of this invention is to provide a system to properly charge a receiving fee for a particular packet data to a sender of the particular packet data in circumstances in which the packet charging is performed. A mailing request receipt processor 110 registers information regarding a destination user, a sender and a particular packet data to be sent in a storage device 120 for storing a mailing request for advertising. When a terminal of the destination user registered in the storage device 120 conducts a process to receive packet data, a packet switch 5 charges the destination user for the packet data. A charge transfer processor 150 transfers the fee charged to the destination user for the particular packet data, to the sender registered in the storage device 120, by using a receiving status data for the particular packet data by the terminal 9 of the destination user, which is registered in the storage device 120.