You get a call from a store about a purchase you know you didn't make.

If you do get this type of call, don't give out any information because the call could be a phishing attempt (when thieves pretend to represent a store or bank in hopes you will disclose personal financial information – like your Social Insurance number or bank account password).

Find out as many details about the purchase as you can, as well as the caller's name and contact information. Look up a contact number yourself. Call the company after you've checked it out. Only after you know the company is legitimate should you give out any personal information. Then, call your credit card company and let them know that your card was used fraudulently.