Confetti Redux

It was only a few days ago that we took a peek at the issue of credit card fraud. Well tonight, I opened my mailbox to find this suspect post card claiming to be from Citibank and urging me to call regarding a security issue. The manner in which the information was sent to me - via a flimsy postcard - raised my suspicion; could this be an attempt to phish my account information? Surprisingly, it wasn't. The number on the postcard matched the number on the back of my credit card. Apparently, a merchant - I don't know who - where I had recently completed a transaction, was hacked and my transaction data was compromised. Fortunately no charges had been made on the account and we cancelled the existing card and account number.