1. Sign new and replacement cards immediately.

2. Destroy the old cards by cutting them into pieces and shred all old receipts and bills.

3. Don't fax your credit-card number, if possible.

4. Don't give your card number over the phone unless you have initiated the call.

5. Destroy any carbon paper if it's used as part of the credit card transaction. Somebody can grab it and forge your signature.

6. Don't respond to any "scam" e-mails requesting your credit card number.

7. Never send your credit card number in an e-mail to anyone!

8. A good option for discouraging theft is to choose a credit card that includes your photo and signature on the card.

9. If you have questions about mistakes or unauthorized items on your statement, you have the right to challenge them.

10. If your card is lost, stolen, or you suspect fraudulent use, call your company's 24-hour hotline immediately to prevent your card from being used as little as possible.

via ec-online