Several embodiments of turntable systems for loaded pallets are disclosed. In some embodiments, a first ramp leads up to the turntable and a second ramp leads down from the turntable on the opposite side. In other embodiments, at least two turntables are positioned adjacent one another, optionally with a bridge surface connecting them so that a pallet lift can be driven from one turntable to the other to place one pallet on one turntable and another pallet on the other turntable according to a method disclosed herein. A validation system without a turntable includes a plurality of cameras about a periphery of a platform weight sensor.