I recently change my address and update my address via AR-11 and by calling USCIS 800 number. However, I just check my pending 485 case online. It says that the last USCIS written notice return by post office as undeliverable. So I call today and update the address again.
My current situation is that I already have the invterview with USCIS for 485 and waiting for FBI name check. I have no idea what is this "last written notice" is about. Any friend have an idea? Could it be good or bad news. I am quite nervous. Please share your experiece. Thanks a lot.