You rent a nice vehicle and the agent you are renting from asks you to pay a mandatory insurance fee. You might be okay with that, since insurance is important.

What you probably don’t know is that your own credit card has auto insurance incorporated already, so the rental company guy is just milking you of more money. Most credit cards cover the auto insurance; most people don’t realize this. Of course, the agent knows, but he gets a commission for selling you the extra insurance.

How to avoid: every time you are about to rent a car, look for what your credit card covers.