Ahem
Since I am tired of having this argument:
That would be Visa’s card acceptance policy. Yeah, all those people who tell you to leave your card unsigned or write “See ID”? They are wrong. Wrong. Wrong. Wrong. WRONG!
Here’s American Express. And Mastercard, which sayeth: “The back of the card must be signed, and the signature should reasonably compare to the cardholder signature on the sales receipt. Check to be sure that it has not been taped over, mutilated, erased or altered in any suspicious manner.”
The big three all say the same thing, kids, and that is: SIGN YOUR DAMN CREDIT CARD.

June 26th, 2008
When I was at the post office today, I noted that someone else is apparently tired of having this argument too, because this very page was printed out and taped to the counter.
June 20th, 2008
People argue with you about this? Crazy. Aren’t merchants actually barred from asking for ID when you produce a credit card?