Credit cards offer a number of great benefits, including security when shopping online, rewards, and a chance to prove to lenders that you can be trusted with borrowed money. But their high interest rates can also ruin your life if used irresponsibly.
Even if you aren't carrying a balance, there are still a lot of small mistakes you can make with credit cards that can cost you rewards, hurt your credit score, or just inconvenience you. Here are 30 of these mistakes you should avoid.
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