Hey Jer:

I have found out that it really depends on your particular driver, whether it be FedEx or UPS. One driver may be very "by the book" at all times, where another may be very lenient.

Anglwink has the definitive solution though if in doubt:

"You can go to the hub and sign a "Signature on file" card and they keep the card and you will never have to sign for a fed-ex package"