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Originally Posted by MikeyB
But I fail to see how a 4 digit number on its own, can be any more secure/insecure than signing, surely it's so much easier to watch someone taping 4 numbers than trying to copy a signature.
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You can't use a C&P card you have stolen unless you first watched the person you intended to steal it from, use the PIN at a cashpoint or in a supermarket. Most stolen cards are stolen along with carelessly carried purses, wallets or handbags by opportunist thieves who have not first 'shoulder surfed' to acquire the PIN number of any card that might be inside. Those cards are, under a C&P regime, useless to the thief. Unfortunately during this transitory phase even new C&P cards still have strips and signatures, so can still be used at any shop where the thief can persuade the retailer to let him sign instead of use his PIN.