Our case we already did biometrics and received 1 year extension letter therefore so far all is good.   I have seen posts about people not receiving their RFE etc's...Lost in the mail perhaps, not delivered maybe   I was wondering if is recommended to call USCIS to check in the status of your case since their online case check is stuck at the bug ''fees were waived.''   And if so, how long should you wait to call to make sure there's no lost mail and that everything