Patent ID: 7984510

Claim:
A payment card which has an approximately same shape and same size as a credit card and performs payment processing with an external card payment processing apparatus, the payment card comprising: an interface section to transmit/receive data for card payment to/from the card payment processing apparatus; a telephone communication section to detect an arrival of a call with a telephone number via a public telephone network; a display section to identifiably display a state of the payment card; a storage section to store payment information for performing payment using the payment card, and to store specific telephone number information for making the payment card enter a payment-enabled state; a temporary storage section to store information indicating that the payment card is in a payment-disabled state in a default configuration, and to store information indicating that the payment card is in the payment-enabled state when the payment card is temporarily changed into the payment-enabled state; a judgment section to obtain the telephone number at a time of arrival of the call when the telephone communication section detects the arrival of the call from the public telephone network, and to judge whether or not the obtained telephone number agrees with the specific telephone number information stored in the storage section; and a control section to set the payment card to the payment-enabled state temporarily and to store the information indicating that the payment card is in the payment-enabled state in the temporary storage section when the judgment section judges that the obtained telephone number agrees with the specific telephone number information, and to permit reading of the payment information stored in the storage section with respect to an access from the card payment processing apparatus; wherein the display section is provided on a surface of the payment card, and displays that the payment card is in the payment-enabled state when the control section sets the payment card to the payment-enabled state temporarily.