The only time I ever triggered fraud detection system on my card I got a text message from bank that was "Your card is blocked due to suspicious usage, please call 'number'". And the number was also some random unlisted one.
Only reason I didn't just ignore the thing is I did make a purchase on new website a half an hour before.
Called my local bank and they confirmed this was legit, I almost went off on a full rant about how bad their protocol is for this.
Called my local bank and they confirmed this was legit, I almost went off on a full rant about how bad their protocol is for this.