> I was eating at a restaurant and got a call from an unknown 800 number that I didn't answer. [...] I called the number back and it was the issuing bank's frau

> I was eating at a restaurant and got a call from an unknown 800 number that I didn't answer. [...] I called the number back and it was the issuing bank's fraud department saying my card was used suspiciously and they've cancelled it. Once, I was also eating at a restaurant when I got a call from an unknown number. I answered, and they said it was the issuing bank's fraud department, saying my card had a couple of suspicious transactions... But the call itself was the fraud. Luckly, I knew from the beginning that it was a fraud (the value of one of the "transactions" was high enough that I would have received a notification SMS), so I strung they along to waste their time, and stonewalled the moment they asked for personal information. And just to be sure, I went to a bank branch nearby (it was lunch time, and there are several bank branches within a few hundred meters) and they confirmed the "suspicious transactions" didn't exist at all.