When you use the MB, your name shows up on the screen, at least for FP+. I haven't looked at the screen when you first enter the park, but I'll bet it does there too. Then all they have to do is ask you for ID to see if you really are that person, if there's any question. This keeps happening to me when I enter the park because I keep switching the MB to the opposite wrist, which means I then use the opposite finger to scan as well. I'm trying to remember to keep the band on my LEFT!