Abstract: A system and method for preventing the unintentional abandonment or leaving of a child in an unattended vehicle utilizes an electronic system installed on a vehicle and a sensor installed on a child safety or car seat, or on a vehicle itself, to detect when a child has been unintentionally left in an unattended vehicle. If the electronic system determines that a child has been left, a signal is communicated via a transmitter to a parent, care provider, other individual, and/or police or other rescue personnel so as to alert same.