My husband accidentally left our personal car fob in the Hertz rental car in Phoenix instead of the rental car fob, but discovered the issue as we were going through TSA. We rushed back to Hertz as we had the time to do so, despite the extended effort to get there, and while en route back to Hertz, they charged our credit card $250 for their key fob. Luckily, they backed the charge off very quickly after we returned the appropriate key fob to them.