Going on an international trip is very exciting but it can also be very expensive. Using a credit card to pay for purchases when traveling internationally is often the best way to get a good exchange rate and the rate your bank gets will be better than the one you’ll get on your own if you exchange cash. Using a card also means that you don’t have to carry around a bunch of cash with you. However, many cards will add on a “foreign transaction fee” to any transactions made with anything except your home currency. Here’s an easy way to keep from paying that extra 2-3 percent on all of your purchases while away.