the present invention is described in detail below with reference to the drawings fig1 is a functional block diagram of a licensee notification system according to a first embodiment of the present invention this licensee notification system is a system where cd roms storing a large number of software items of restricted function are sold cheaply and software sales are effected by selling the information needed to cancel the function restrictions of the software in this cd rom payment of the fee could be effected by for example notification of the subscriber number of a cash card or notification of a bank account withdrawal number or the like as shown in the drawings the licensee notification system is constituted by user terminals 11 and management center 12 connected by means of a communication circuit user terminals 11 and management center 12 may be described as computers and commence operation as an ensemble of the function blocks illustrated when prescribed programs are run first of all the operation of management center 12 will be described management center 12 is provided with two databases called user database user db 13 and software database software db 14 as shown in fig2 user db 13 stores the correspondence relationship between the user id which is identification information given to users of this system by the manager and the user name which is the identification information of the user as employed in ordinary society as shown in fig3 software db 14.