Abstract: A method of distributing data relating to a threat-detection system is provided. The method includes, at a threat-detection information management system, receiving an initialisation request from a central monitoring system, the initialisation request including a client identifier and client data location information relevant to a client site monitored by the central monitoring system. In response to receiving the initialization request, a respond site code is generated and stored with the client identifier and client data location information as a respond site record, after which it is transmitted to the central monitoring system. An operator of the central monitoring system provides this code to a responder system. A verification request is then received from a responder device, the verification request including a respond site code.