A $93 “top off” charge for my rental car?

Danny Griffin just received a $93 bill from Hertz for refueling his rental car. But wait, didn't the company give him a receipt that verified his tank was full when he returned the vehicle? Yes, but that doesn't make any difference.

The Travel Troubleshooter: The needle may be on “F” but I’m not done paying

Stephen Farr returns his rental car with a full tank of gas. Or so he thinks. Now Alamo has charged his credit card for two more gallons at its inflated rate, and it won't tell him why. Is there any hope for a refund?