One time last winter I was at the bank and lamented to the lady behind the counter that no-one ever checks the back of my card for the signature, and if they did, how would they know it was really mine? She said “Just write ‘See I.D.’ on the back, and they should ask to see your I.D.” I got a new card about a month ago because my old one was crumbling, and I did it.
Now just about every place asks to see my I.D. and I love it. It makes them think about it, and shows me that if someone snagged my card they’d have to jump through a hoop or two to abuse it.
The worst place to use a card? Any fast food place. They’ll take ANYTHING from ANYONE, and let them charge as much as they want with no PIN, signature, or anything. So if your card gets stolen, look for thousands of dollars spent at McDonalds. 🙂