Here's a tiny mistake that, in the process of renting a car in Europe, could cost hundreds, even thousands, of dollars. You have a pre-paid rental but there's a small vehicle license fee that must be paid in Europe. You reach into your pocket and hand over the few euros required. If you are relying on a credit card to cover the collision (CDW) and theft insurance, you've just canceled the card's insurance protection. For the credit card's insurance to be valid, you must pay for everything on the rental invoice with your credit card. The other two credit card requirements are that you decline the rental company's offer of insurance, and that you advise the credit card company of damage to the car within the required period of time.

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