OK, just reading the last page or 2 of posts on this thread, I see that I probably should not be concerned... mailed about 12/1/20, the check cleared my bank on 12/10/20. When I look for passport renewal status, the system says they cannot locate any such renewal at this time. FWIW, I did tack on the extra fee for "expedited service". But I see that many people have delays far longer than mine, which basically sits at a month. Was concerned that they didn't seem to have it logged into the system as yet. Philadelphia office BTW.