In the case of credit card signatures, the best they can do is try to match your signature to the one on the back of the card.
And even that "best" attempt is pathetic on the face of it. What, the person behind the counter at 7-11 is now supposed to be an expert in graphoanalysis? "In between cleaning the bathrooms and stocking Coke, you have to verify the authenticity of the signatures on these contracts."
And even that "best" attempt is pathetic on the face of it. What, the person behind the counter at 7-11 is now supposed to be an expert in graphoanalysis? "In between cleaning the bathrooms and stocking Coke, you have to verify the authenticity of the signatures on these contracts."