You were instructed by your credit card provider to sign the card.
True. But virtually every article I've ever read on fraud protection tells you not to because then a thief would not only have your credit card, but know how to forge your signature as well. I've never heard of any business turning down a card because it wasn't signed (heck most don't even bother looking to see if it's signed). But I suppose legally, they have the right to do it.
And being good sheep, we should sign them, No?
Mine say ‘Check ID’, only.
When asked to show my ID, I Always thank the person asking.
My cards have not been refused.
Go Baaaa somewhere else.