So there's a strip on the back of all your credit cards that houses the information about your card. It's how the card reader pulls your information.
And then under that, there's a spot for your signature.
This is difficult for some people to grasp.
On a lot of cards, the information strip is black. Sometimes, though, it's silver. Way more often than I should, I see cards that have been signed on the silver strip.
Like, really? The fact that it's silver threw you off that much?
People are just so dumb.