I work for FedEx
1st, when millions of pkgs are moving for an overnight delivery, some will be damaged. But overall, it's a small number, and should statistically be random. If you have an ongoing problem with shipments being damaged, there is some problem in the regular lane of movement to/from you, and needs to be addressed with complaints. As to theft, it does occur. But again, it's pretty rare overall. There is just no time to be opening and digging around inside pkgs. The movement is constant, and there are just too many witnesses that would see it happening. When a pkg is accepted, and then afterward, found to be damaged, there is recourse. Call the claims dept. I've been successful with this with a UPS shipment that was dropped off & damaged. I know it can be done with FedEx. If you see visible damage to the box when it's being tendered to you, there are delivery exception codes the courier can use, to indicate the package was delivered, but it was damaged at the time. FedEx also has scan codes for indicating a pkg appears damaged while enroute through the system. So even if a pkg is left at your door when your not there, there may already be a damage scan on it. Call claims dept.
And finally, over the years, I have seen some packages, that I could not believe the shipper truely could expect to make it through the shipping process. Envision millions of boxes, picked up, set down going down conveyor belts, shoved by mechanical arms onto large slides, running into each other & piling up. This can happen several times from origin to destination. This is happening FAST. Some of the damage is just do to the nature of the system, not how a person may handle your pkg. So pack it like it's the ball at a rugby game. Use a strong box. Don't just rely on the waybill attached to the box to get it there. Those sometimes get torn off. Then we have a mystery pkg. Don't know where it came from, or where it's going. WRITE on the box, on two sides, all the shipping & delivery info. I personally put it on a piece of paper as well & put it inside the box. If your using some sort of wood or plastic container, the sticky pouches & labels don't stick very well, and come off. Put your info inside, in case we need to open the pkg to find out who it belongs to. Use REAL packing tape, and plenty of it. I've seen file boxes full of papers ( read that as HEAVY ), sealed with a single strip of scotch type tape. NO way that is gonna hold. Guess saving a dime on real tape was more important than those files.
We want the pkg delivered on time & in good condition. But it's a partnership. The shipper has to do their part as well.
Tuckerdog1