The invention presented comprises a system and method for executing a cash payment via a computer network. A payor computing device communicates over a computer network with payee computing devices via a P2P server. The P2P server is operative to receive a payment request from the payor computing device and process the payment by debiting a financial instrument specified by a payor utilizing the payor computing device. The payment request is transmitted from the P2P server to a cash payment server operative to receive the payment request and translate the request into the native format of an ATM control server, the native format of the P2P server and ATM control server not being interoperable. The ATM control server is operative to generate a PIN code, which is transmitted along with the received payment instructions to an ATM.