Some people rent cars when are about to have a long trip and don’t want to overuse their own vehicle. That’s when they might get excited when they see ads promoting “Unlimited mileage” offers.

What happens is most of these rental companies have a clause in the fine print stating that the offer applies only to “in-state travel”, but they won’t mention it to clients who they know are about to go far.

How to avoid: not reading the fine print and bringing the car back 5,000 miles later, after taking it to the mountains, could give you huge charges on your bill. Read the fine print!