A system and method for coordinating processing of a cardholder present financial transaction between the cardholder and a merchant system. The system collects a transaction amount of the financial transaction associated with merchant identification information of the merchant system. The system sends an authentication request using a wireless communication protocol configured for proximity communication between a communication interface of a computer device and a wireless communication enabled integrated circuit (IC) chip of a payment card, the authorization request including an IC command expected by computer hardware of the IC chip. The system receives an authentication response from the computer hardware of the IC chip by the wireless communication protocol, the authentication response including an encrypted value generated by the computer hardware of the IC chip.