I received a call from them on Friday February 29th.  They said I was entered into some contest because I used my Visa or Mastercard.  They said that I had won the "small prize" from their local office of a diamond watch, and 4 magazine subscriptions for $20 (one time).  I said, sure why not.  They hadn't asked for my credit card number or anything.  The girl asked if I would be able to pick up a call from her boss in about 10 minutes to evaluate her performance.  I said "sure".

After I did so, we talked about how nice the girl was.  He then proceeded to ask me for my security code.  I got suspicious at this point and asked "which credit card".  He said, doesn't really matter.  I hung up at that point, because if I had won some contest with my credit card they would know which one.