That's a bit confusing. Usually credit card frauds occur after they're stolen. The best thing to do is to monitor the bills you get from the malls (demand for a bill if they don't give it) and see that it matches your charges.
Also, keep your cc locked up somewhere. For all you know, it could be your family or friends or acquaintances using the cc number. On internet, all you need is the card number, not the physical thing...
The general tips to keep fraud at bay is:
- Never give your card number to strangers or telemarketers who call you on the phone. Be wary of a tantalizing offer or prize that requires you to give out your credit card number.
- Write down the toll free numbers for reporting your credit cards lost or stolen and keep the number at home, in your purse or wallet and at your office so that you will be prepared to call immediately if you have to.
- Always check that you get your card back after you make a purchase.
- Keep your cards in a safe place that won't be obvious to burglars.
- Always sign your card in ink as soon as you receive it.
- Never lend your card to anyone. If you want to let someone else use your card to buy something, handle the transaction yourself.
- Shred all credit card receipts and pre-approved credit card offers into tiny pieces before you throw them away. Keep your billing statements in a safe place.
- When you use your credit card online, make sure you are using a secure Web site. Look for a small key or lock symbol at the bottom right of your browser's window.