I am in the same situation. I do not get mail at my residential location (Except for FedEx/UPS). My mailing address is a PO box in the next town over. What you should do in any circumstance is, call immediately after you apply, and let them know that you have two addresses, one mailing and one domicile address.
Starting Score: 521 TU, 622 EQ on 6/20/2011