Wow well I just got screwed over by someone. I did a trade in when I bought the new phone..........same as I always do. Old ones dropped at Fedex on Wednesday evening and received next day by Apple's return facility near us. Got an email this morning saying the box was empty and asking for details on what was in it and how it was packaged. Great, now I'm guessing I'm going to be out my $480 trade in and of course no longer have the old phone.
That’s pretty terrible luck, chances are you might not be the only one this happened to.
There may be a silver lining yet, an investigation will be conducted and you might receive your deduction in due course.
Contact Apple customer support and take it from there.
Edit: on the bright side at least they didn’t also get your new iPhone.