![]() A payment with no CVV provided at all may be accepted by the issuing bank, but if challenged as fraudulent, the merchant will be liable for the refund.As well as the general rule of not giving the attacker information by rejecting too early, there are some things specific to the payment industry which are somewhat relevant.Īlthough often presented to the customer as mandatory, the authentication information on a payment is generally used to evaluate risk and to assign liability.
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