A system for detecting a passenger in a rear seating row of a vehicle and alerting an occupant of a vehicle when a passenger safety device in a rear row is not properly used. Occupancy is determined by sensing any actuation of a switch or control in the rear row along with detecting sounds made by the rear row passenger. A processor receives control activity signals indicating that a control has been actuated, receives audio signals generated by a microphone, and uses the control activity signals and the audio signals in combination to determine that the passenger is present. The processor also receives a status signal from the passenger safety device indicating that it is not in proper use. An occupant alerting device provides an alert to the occupant if the processor determines that the passenger is present and the passenger safety device is not in proper use.