My CC credit union outsources its fraud investigation. So I get a cold call from a company I don't recognize, asking me to confirm my identity and CC info, from a phone number that isn't on the back of the CC, in order to confirm some activity. I hang up, call my credit union from the # on the card, and they confirm that the company was legit and give me the number to call back. Turns out the original call was real. The last thing I say to them is that they are conditioning their customers to respond to cold-calls claiming to be a fraud department--not wise for an actual fraud prevention company.