Filed I-485 and AP in mid-June. Got AP receipt notice and finger printing notice but NOT I-485 receipt notice. The online status says today that a written notice was returned to the center by the post office as undeliverable. This could have been the I-485 receipt notice. The weird thing is: I've been receiving all the other letters at the same address!!!
What should I do in this case? Pls advise! Thank you!!!