a computer readable medium has computer readable instructions stored thereon . the instructions , when executed by a processor communicable with an image forming device , cause the processor to perform the steps of transmitting , to a first server connected with the processor via a network , a request for supply of an expendable item for the image forming device , acquiring a first identification for identifying the expendable item to be supplied via the first server , which first identification is transmitted by the first server in response to the request , storing the first identification acquired , onto a database , acquiring a second identification for identifying an expendable item attached to the image forming device , determining whether the second identification acquired is identical to a first identification stored on the database , and outputting first information when it is determined that the second identification is different from any first identification stored on the database .