Years ago, I had had UPS destroy several shipments, and then attempt to claim that the shipment was “insufficiently packaged”.
My response was to demand proof of this deficiency, return the carton(s), or at least provide a photo. They could do neither - they simply discarded everything rather than return something so damaged. We went back and forth for a while, as they want to use low-cost employees to make getting reimbursed cost more than the reimbursement to discourage claims, but I eventually made them see the light, and got paid.
So, I visited the local “sorting center” when the next such incident occurred, unannounced. They were not happy, but I dressed the part, wore a hard hat, and carried a clipboard, so no one stopped me from entering and wandering a bit before I “found” a supervisor, or, more to the point, he encountered me.
The place was several stories tall, and the most common way a package would be “sorted” seemed to be to have it fall off one conveyor belt about 6 feet down to one below. Most cartons executed at least a 90-degree rotation during the fall, so forget about “this side up” as having any meaning to UPS. The conveyor belts are hard, so one needs to test with drops onto the concrete floor of the warehouse, nothing less brutal.
I did not find my missing package, and I did not see any tossed-aside remains of any other packages that had burst open and disgorged their contents on the floor and the conveyor belts, so someone DOES at least “clean up”, but they don’t seem to try to salvage the shipment as often as they might, or they truly are running over things with trucks and spearing cartons with forklift forks.
Of course, when they DO salvage a damaged shipment, they send it back to you, often missing some of what was in the shipment, with their stock excuse of “insufficient packaging”.
On pallets, we attach a “Tip-N-Tell” to the inside of the #1 carton (the one with the BOL attached) and we also photograph each pallet before it goes out, sending the photos to the customer. It is amazing how often a shipper will do damage, and restack, wrap, and band a pallet to attempt to hide the damage, most often by moving the damaged cartons, or carton surfaces to the inside where they will not be visible until the pallet is unpacked.
Drawing diagonal lines with fat Sharpie Markers from top left to bottom right corner boxes on all 4 sides of the boxes “as stacked” is a big help as one can tell at a glance if something is amiss. This helps our non-Amazon customers quite a bit, if nothing else, it builds confidence when a shipment arrives and “looks intact”.