tracking number, tracking number, tracking number, delivery confirmation.
I've had more than a few packages go missing..... one was nice enough to ship me back the empty box which made it to the PO (opened, which is why it was snagged) 1/2 way to it's destination.
if it's something youc are about, dont' use fed-ex. I know this sounds awful since my brother in law owns a bunch of their routes, but my other brother in law shipped his stuff out west when he moved via fed ex (got other BIL's discount of 1/2 off) and they BROKE most of his stuff (including his desktop computer... yes, they paid for the repair but still....). the boxes were badly damaged when they arrived at BIL's new house.
I prefer UPS if i can't hand deliver.