@neurovagrant I used to write “please check photo ID” on the back of my credit cards, back before chip/pin was common. About half of the time, people didn’t even look at the signaure section. Another common reaction was turning the card over to see the “signature” (which clearly looked nothing like what I just signed), and promptly ignore it.

Sometimes, just sometimes, they’d actually look, and ask me for ID (yay!). I had one place insist that I sign the receipt with “please check photo ID”. And no, they didn’t check my ID.