Sorry for the thread drift, but is the letter certified/signature required? Our mail is so inept, in the last year at least 30 letters and packages have been delivered to another house. At least that neighbor is nice and we get our mail eventually but counting on the mail to get something important sounds silly to me, in my experiences. In other words unless you signed for it how can they know you actually got the letter? We've tried delivery confirmation as well, no help, it just says "delivered" with a time and day but doesn't mean at the correct house! And yes we've talked to the post office. Sorry for the rant. I'd just be damned if the FAA would pull my medical due to the post office.