> the transaction is considered valid if the > signature on the card matches the signature > of the receipt In the example above, both the receipt and the

> the transaction is considered valid if the > signature on the card matches the signature > of the receipt In the example above, both the receipt and the card were signed at the register. It would be extremely odd if they didn't match, even if the person paying was a fraudster, therefore it's odd for her to verify them.