I haven't found this by searching, so I wanted to get other people's experience noted.
My package is currently out for delivery from Amazon, via Fedex. Does Fedex require a signature or can they just drop it off at your front door (I'm in a house, btw).
But it's up to the driver to determine if there is a 'safe' place to leave the package, if there isn't they leave a note on your door saying you can pick it up from their office in the evening or they will try to re-deliver the next day.
In my area the drivers typically just leave it by the door, they don't even knock or ring the bell.