A scheme is provided for managing device identification information of an
image forming apparatus used by a client. A combination of first device
identification information and second device identification information
which are obtained from a predetermined device is compared with another
combination. In accordance with the comparison result, a notification is
issued to a remote monitoring computer that is capable of receiving the
notification through a predetermined communications line and that manages
a plurality of information processing apparatuses, thereby allowing for
prompt processing at the remote monitoring computer.