Wasn't asked for ID despite getting that message and having to go back to the counter to swap cars (the car that was auto assigned to me had expired plates). But I just got lucky and I was sweating bullets when I knew I had to exchange the car. Had a backup reservation at 2x the cost, but that was better than the standard Avis 4x the cost though. Its getting even more difficult now, where the best rate I can find is 4x and the Avis walk up rate is 8x.