<p>A method of operating a printing apparatus a sub system in the apparatus is provided, wherein this sub system is disposed in the module which is separable from the apparatus. A code is associated to the module. A message derived from said code is communicated from the module and/or the apparatus over a network to a network user to order an ancillary part separate from the module, a part of the sub system or a replacement module. By such a method in a corresponding printing apparatus it is possible to provide corresponding information with a simple construction and with high speed to a location outside of the printing apparatus where such information is requested or needed. <IMAGE></p>
