PRAGUE, CZECH REPUBLIC -- I rented a car in mid-October, returned it and had the inspector sign off that it had no damages, but needed to have the gas refilled. In mid-November I got a bill on my credit card for about $350, which given the price of petrol, seemed about right. Then two weeks later, another bill was posted on my account for $783 -- no explanation. They provide no email contact number and have limited English so I have simply asked my credit card company to challenge the bill.
In forty years of renting cars, I have never received such bills without prior contact or information, and in this case there is no justification. I have since noticed another complaint on My3Cents about the same company from approximately this same time period. I would recommend everyone avoid this company at the Prague airport.