Apple / Verizon should be able to track this device by serial #. Should not need Perry Mason to sort this out.
Exactly. They are the ones with the means to track it, not the buyer and FedEx.
And in all honesty, how does anyone know it was someone within FedEx? It's just as likely someone in the warehouse opened the box and sealed it back *before* it got handed off.
All a signature really does is stop a package from being left on a doorstep for someone to steal/get ruined in inclement weather. It doesn't really even ensure that it was taken to the right house. I had that happen far more than once when I lived in a neighborhood where there was two letter differences in street names, and the houses were all numbered the same on each one.