Does anyone know how appointments are delivered for the class of 2013? I have heard different methods have been used over the years. Specifically, for the class of 2013; is it Fedex or USPS? If it is Fedex, is a signature required? If it is USPS, is it normal mail or priority mail? Is a signature required? Just wanted to get an idea if it will be undeliverable if no one is home.