Hi all. I have a question here. I will be staying at a place that is a bit remote, the place has its own address however, for posts, letters and i believe parcels too, the physical address is not being used and residents there use PO BOX (since delivery is done to a mailing center and residents will have to pick up the letters there). So what am i suppose to do here? For USCIS AR11, If i use the physical address, there is a chance that the letters from USCIS might not reach me (and i need to replace my already missing GC [MIA before i even received it] which is costing me a sum of money per GC), but if i use PO BOX, i am a bit concerned that USCIS might not accept that as a location where one can reside. Any thoughts?