- A caller claims to work for the fraud department at Visa or MasterCard and provides a badge number.Do NOT give out the three-digit code and do NOT verify other information the caller claims to already have. Thieves who may have already stolen your credit card information from another source can't use your card until they get the three-digit code to complete their fraudulent transaction.
- The caller then asks if you recently purchased an anti-telemarketing device for nearly $500. When you say "no," he tells you the fraud department has been watching that company.
- He then offers to block the charge and asks to verify your name, address, credit card number and expiration date, and asks for the three-digit code on the back of the credit card.