I got a call from this number, and while I usually screen unknown numbers, I actually answered it for some reason. It was a guy who said he was from a card services fraud detection, and he wanted to verify that a purchase I made last night was a legit purchase. He said my name and accurately described the purchase. I confirmed those two bits of info (and I didn't give him any other info) and he said that the block on my card would be removed in 3-5 minutes. I then called my bank and they said that this was most likely Visa calling to ensure the card purchase was legit. So it seemed real to me. In hindsight, I did attempt to use that same card last night on iTunes AFTER making the $500+ purchase, and the iTunes purchase would not go through. So my instincts seem to say that this was a legit fraud detection. I'll keep an closer eye on my account for sure. I hope this helps!
Similar to Wes's - left message -Asked for my son - Said they were working for 5/3rd banking CC - that suspicious activity on debit card, that they put a hold on debit card until they talked to him. Sure enough called son and card had been frozen when he tried to make purchase and they called him as well. ( had to put "unknown" since 800 notes lacks correct legit definition)
Reportedly credit card fraud services; however, he was asking die my card number and personal information. He was unable or not willing to tell me which credit card company he was calling on behalf of; I checked my cards and no questionable activity was noted. It is my belief that he was attempting to defraud me!
This call was legit from Mastercard to verify what they thought to be a possible fraudulent charge. I verified the purchase without divulging any personal information, and that was that.