"I bought a pre-owned luxury watch online and had it delivered by mail. I left the unopened package on a table by the front door and it vanished. It might have been stolen by a thief, or maybe someone in my family tossed the package without knowing there was something inside (though my family denied doing this). My home insurance covers theft, but what about loss? Can you tell me how to approach this situation, since I have no idea what happened to the watch? "