What happens if FedEx comes, and I'm not home?

My mother ordered me a Verizon Wireless iPhone 5 on Friday, and tomorrow is going to be Wendsday.
I have school tomorrow, and I'm usually back home by 3:30PM. I'm scared that when I'm not home, I'm not able to receive my new phone. Also, Verizon Wireless emailed me today at noon giving me the tracking number, etc. From FedEx and it says it's "not found" on the FedEx website. I'm so excited to get my new phone, so I hoping it would ship safely to my house.

Verizon requires an adult signature when packages are delivered. If no one is home FedEx will leave a slip on the door about how to contact them for redelivery or how to arrange to pickup the package at a FedEx store.