Credit card scams are nothing new to BBB, but a new one I've received information on is working on 2 levels and definitely warrants giving some attention to.  Here's how it works...someone will call you on the phone impersonating your credit card holder (VISA, Mastercard, etc) saying they're from the Security and Fraud Department.  These people already have your credit card number through some form of identity theft, but they can't use it yet and will sound officially because they will be giving you all the information.  They will often give you a badge number and tell you that your card has been flagged for an unusual purchase pattern and that they're calling to verify.

The purchase in question will be referred to as an Anti-Telemarketing Device for $497.99 and of course you will say that you didn't buy it.  The scammer will then say they will issue a credit to your account for that charge and begin a fraud investigation and will give you a 6 digit "Control Number".  The scammer will then read back to you, your own address and have you verify it so they can send you a statement showing your account credited.  The final kicker now begins...the scammer will say they need to verify that your card hasn't been stolen and will ask you to verify the 3 digit security number on the back of the card.  If you read those numbers to them, they will say "thank you" and ask if they can do anything else for you and hang up.  Now you've been had.  The scammers have a verified address and your credit card's security code (remember they already have your card number) and can now make purchase after purchase.

VISA Security has identified this as a scam and says they will never ask for anything on the card as they already know the information given that they issued the card to you in the first place.  If you feel you've been scammed, contact the police and your credit card issuer to try and get the charge disputed.  If nothing else, most credit card companies have a way to look at your statement online so if if there really is a phony charge on your account, you can see it for yourself.