There is one aspect of Fedex that most people are not aware of. Fedex leaves hangers on door knobs asking for permission to redeliver, and not get a signature when they redeliver -- to leave it on the door step. Once that is signed, it applies FOR FIVE YEARS.
If you live in a rental, and anyone signed that, it applies to the house or rental for the five full years.
I once sold an item through Ebay. The guy claimed he never got it. Fedex claimed they delivered it -- without getting a signature. They explained that someone had signed the door hanger, three years earlier. This was done by a previous renter, not by the current occupant, but Fedex didn't care.
What made the difference is that in the intervening years the legal owner of the residence had changed. So the previous signature had no validity at that location.
Fedex was then forced to pay the insurance.
Fedex is notorious for this policy. But UPS also leaves packages without getting a signature.
The above advice to ship to your work location is the only solution.
When I ship an item I sold on ebay, I ship through the USPS only and pay for certified delivery with signature required -- the signature of the person the package is delivered to. That is the only way to prove delivery.
Or not, in the case of Fedex or UPS