Try putting up a piece of paper on the door that states your name, and that you would like them to leave the package there, and put your signature, and also put like where the package is from just for extra security. Also if they come, need you to sign it, and you're not around and they don't leave it, fedex will leave a piece of paper saying that they were at your house at X:XX time and that they couldn't reach you and you need to sign for the package and that they will be back at X:XX the next day and if you want them to leave it there's a place to sign it at the bottom and they'll leave it there for you.