Where do I FedEx my passport application to be certain it arrives at correct location?

We need a physical address for the application and I am requesting a signature receipt to make sure the passport arrives safely. Where do I mail the passport?

Source: http://www.us-passport-service-guide.com/where-do-i-fedex-my-passport-application-to-be-certain-it-arrives-at-correct-location.html

apply for a us passport can a felon get a passport us passports