My Mastercard credit card was compromised with 2 attempted charges, both occurring at physical stores, not online. I'm in Florida, and the first one was for $4.00 and change at a store in Massachusetts. The second at a Duane Reade in NYC - for $504.95 - so apparently a GC attempted purchase. Both were declined, and my Mastercard now shut down. Not the first time this has happened and not blaming Mastercard, of course, as these fraudulent attempts are so common among all CC companies. But I'm curious to know what, if anything, do you do to protect your CCs? Does any method actually work to lessen what a PITA it is when your CC has to be shut down for attempted fraud?