The process encompasses the communication between trade system accessible over GUI of the mobile communication device (4), when after the item being purchased is selected, the acquirer's (12) identification is loaded from the removable memory card (1). The acquirer's (12) identification is sent to the trade system's (2) headquarters, where after it is approved, the transaction payment parameters are created and these enter the removable memory card (1) as an initiator of the payment terminal application. The payment terminal application runs on the removable memory card (1) and it creates a payment cryptogram. This one is sent into the trade system's (2) headquarters, where it can be handled as a common cryptogram of usual POS terminals. The process can encompass even a preparation and pre-preparation phase, thanks to which corresponding applications of individual participants of the system are installed, configured and activated. The online payment can preferably realize even the reset of the counter on the payment device.