If so is there any way around this?
I got a sub back last week and it was a low-dollar sub, it was FedEx and signature. If you're not home during the day see if FedEx can drop it at a local drop-off point and if you can pick it up there? I haven't tried that but have heard of it.
I have all my FedEx packages that require signatures delivered to a drop-off (closest is a Walgreen's) site and I just pick them up there. When you get the tracking email there will be a link to 'Manage Delivery'. You can set it there.