A method for managing an alert generated by a sensor of a security system that is associated with a property, the method comprises: receiving, by a server, a first indication about the alert; searching, by the server and in one or more data structures, for a validator that is associated with a validator address that is within a first predefined area that comprises a location of the property; sending, by the server, to a device of the validator, a validation request for validating the alert; and informing at least one entity out of a police and a central monitoring station about the alert after the validator validated the alert.