A system and method are provided for cancelling out downward directed tension forces generated on an object on a vehicle seat. In active, door-mounted seat belt systems, the belt tension force cancellation system includes a simulator that is operable to transfer upward forces on a door-mounted, lower anchor to the vehicle seat without requiring a permanent anchor point for the seat belt in the vehicle compartment. The simulator can either automatically transfer the forces upon securing the belt about the object, or be selectively operable.