A person returns a $5000 RTX 5090? A manager will be paged, who will carry it over to the high value items cage, in full view of the CCTV.
A person who returns a $5 bike light? And that person has also spent $$$$ over the years with a 0.5% return rate? Straight on the pallet of mixed returns without even opening the package.
Medium-value returns and customers with an eyebrow-raising return rate get a medium amount of inspection.
The returns processor either boxes up many individual items heading for the same destination into a Master Carton or arranges to dispose of the item somehow depending on how the seller wants their returns handled.