A utilization method and system within a communication network comprises at least one service provider and at least one service consumer. In particular, a there is license contract method and system for validating web services during runtime. At least one parameter is provided to define, if and how many meter event requests associated with service requests may be stored in a cache memory. The parameter is predefined and may be contained in the license contract. Further, a counter may be provided for counting the service requests. The actual status of the counter is sent to the service consumer and/or the service provider.