Tips to guard your credit card

I read one article today which talks about securing your credit card against fraudulent transactions. Following are some key points:

• [Preventing Card Swipe Fraud:] The liability always lies with the merchant if he processes a fraudulent transaction without a second glance at the signature. Hence, always keep a photocopy of your credit card (along with the signature) to help you in case of disputed transactions which has to be reported within 60 days. If the signature on the charge slip mismatches with yours then the merchant has to bear the liability and you get your money back. Most card issuers have dispute forms either online or in their branches.
• [Preventing Internet Fraud:] Online transactions require only the card number, validity date and the 3-digit CVV number printed on the reverse of the card. This three-digit number has to be kept confidential to prevent card misuse. Since cardholders often part with their cards during payments, the CVV number should be scratched off or masked with ink to prevent misuse.
• Always subscribe to Mobile alerts available in the form of an SMS confirmation for credit card transactions which help you in checking frauds.
  
• If you "lose" a credit card, you are liable for any fraudulent transaction unless you have covered this risk by signing up for an insurance cover.
• In case the credit card is lose or stolen, you need to block the card by specifying its number so it may be good idea to memorize or note down the credit card number in some safe location.
  

References:
http://economictimes.indiatimes.com/quickiearticleshow/3271503.cms