A message processing system and method providing a broadcast message to a plurality of user devices located within a geographically defined broadcast target area, the system including a broadcast service bureau communicatively coupled for receiving from a broadcast agent access system providing a broadcast request from an originating broadcast agent associated one broadcast agent message origination systems; the received broadcast request includes a broadcast agent identification, the geographically defined broadcast target area, and a broadcast message, the broadcast service bureau verifying the broadcast request as a function of the broadcast agent identification including an authority of the originating broadcast agent to send the broadcast message to the broadcast target area; the broadcast service bureau processing the verified broadcast request for transmission to one or more broadcast message networks providing broadcast message alerting service to at least a portion of the broadcast target area.