The car rental company will charge your credit card again even though you have returned the car safely. The chic bar on the beach charges the bill twice. The airline goes bankrupt and the flight paid by credit card never takes place. In such cases, chances are good that you will get your money back. Buyer protection is available at PayPal. Your credit card has that too and its called a chargeback.

How to use it:

As soon as you notice an incorrect credit...