Is that in the US? seems very relaxed to other countries I have been in. I've been declined in London, Ireland, Austrlia, Thailand, and New Zealand over my signature. From emeory I have never been checked in Spain which is notorious for credit card fraud... and I dont remember getting checked in Germany either... although I may have used a standard debit card with a PIN while I was in Germany.

Anyway I have my sig upside down on my card to create a point in time when I can proove fraud has begun (because travelling is a b/tch and after every trip I end up replacing my card and filling out forms to reclaim fraud).

I often get pulled up and have to show a secondary ID, my passport or something to prove my upside signature is infact upside down.