Originally Posted by ejmelton

This is Avis' definition:

Airport Concession Recovery Fees

Where permitted, in addition to time and mileage charges and taxes, an airport concession recovery fee may apply to rentals from airport locations.
This fee is added to rental charges, collected by Avis and remitted to the applicable authority where the rental originates.

So, is it a tax on rental customers? Is it recovery of a cost of doing business? I dunno.