A method for incorporating one-time-tokens, coupon and reward systems in conjunction with merchants' POS checkout systems in the physical or virtual environments includes providing a consumer computing device comprising an electronic wallet application, providing a One-time Token Redemption System (OTRS) and user electronic wallet accounts, logging into a user electronic wallet account through the electronic wallet application, sending a request for a one-time token valid for a specified time interval and then forwarding the request for the one-time token to the OTRS and upon approval sending the requested one-time token from the OTRS to the electronic wallet application. Next, presenting and entering the one-time token into a merchant point of sale checkout system within the specified time interval via the consumer computing device, sending the entered one-time token to a checkout application, and then processing payment via a secure payment application.