Last week, my mother slid into the AC at DFW. She explained that she was meeting me at the AC later (I have a membership for one more month) and that my flight was late getting in. The fellows at the desk checked her record and pulled up my profile. Yes, we have the same last name and were set to sit together on our next flight. And yes, my flight was late (and she was early). They waved her in (and got SOS's).

They did their due diligence (and when she met me when I arrived I did not even need to show my card...) and that seemed to be pretty good.

Again, the not having an ADV number would tip me off and stop me from letting someone come in with me.