A communication system that intercepts incoming radio signals and transmits a second signal notifying the user that a radio signal has been intercepted. The communication does so by using an interference generator that is passive, such as a shield, or active, such as destructive interference generators to create a zone in which the radio device does not receive the original incoming radio signal. Using an antenna located outside that zone, a registrar then intercepts incoming signals and notifies the user of the communication using a user-defined method. For example, the incoming signal can be rerouted to a landline or a paper message can be generated and delivered to the user.