Abstract: A method for monitoring the correct operation of an electronic debiting appliance which is arranged in a vehicle and makes log entries on a mobile memory module in the context of a use accounting system for the use of a road network or for the entering of a stipulated geographical zone by the vehicle. The use of the road or geographical zone which is subject to charges is automatically recognized by the debiting appliance on the basis of data which is held in a carried memory device and identifies the roads or geographical zones which are subject to charges, and on the basis of data which can be received wirelessly in the vehicle from a navigation satellite system for the purpose of determining the particular current geographical vehicle position. A control device is used which is also set up for receiving data from the navigation satellite system.