I live on an Indian Reservation where the USPS doesn't deliver to my physical address. My license, utility bills, credit card bills, and even my voter registration materials have my PO Box address on them. I did put my physical address (it's a number primarily used for local law wnforcement / emergency response purposes) on the application, but the only things I have with that address on it are shipping labels from packages delivered by FedEx or UPS. Should I cut out one of these shipping labels (along with the underlying cardboard) and bring it to my interview?