I have that kind of thing happen alot. Especially if it is vallet parking. I warn them about the rear-view, and tip em up front.

Many times (maybe half) when I go to leave I find my car is not with the other vallets, but right out front, or beside the vallet-house, etc. Don't know if that is because of the rear-view (can certainly be daunting), or just because the car. Since I will see very very pricy cars valleted beside run-o-the-mill Merc and Beemers, I have to assume its the rear view, or they don't know what the car is, but that's fine by me!

Great stuff, regardless, that always earns em an extra ten, twenty if its my first time there. After 10 years living on the roads I always, always, always wwaayy over tip everyone the first time at a new place, makes return trips very nice.