I had one interesting case last year with Alitalia. Had made two bookings where FF was not incl. Then at checkin, I was together with my collegue, who is just basic member and I am ST E+. She gave the boarding cards and I saw that I was having just FQTV while she had Elite Plus written on the BP. I asked, checkin, why is that so, did you mix up something? No, was the answer... so, I went to lounge.. (PS. Alitalia has actually very helpful and understanding lounge staff, at least in Milano, both MXP and LIN) and asked to recheck.. and voila' the checkin assistant had mixed up us - put my card # on her PNR and vice versa... so, the lounge lady had to fix it back.. (as I wanted to get the miles for my trip, as my collegue was booked in non-earning class..)