FedEx has a lot of options. From leaving with a neighbor, calling before they come, pick up...
Did you call them? The driver can feel as not safe as he likes, if Fedex says to do so he will.
Regarding leaving the package without signature, The driver said he "didn't feel safe" doing that.
I've never had the issue with UPS, or DHL,[].
I love FedEx, they even deliver on Saturday.
I was not aware that anyone but USPS can deliver to a po box.
If I can't get it to my P.O. Box forget it. If it's something that can't be shipped to the box then I have it shipped through UPS. Tired of FedEx's head games and musical packages.