Abstract: The present invention includes device, system, and method of electronic payment. An operator server may transmit, to a smartphone or other portable wireless device of a patron, a unique time-sensitive and location-based code. The unique code may be used to create an ad-hoc linkage or association between the smartphone of the consumer, and a purchase tab of that patron at an establishment or merchant store. The patron may then utilize his smartphone in order to autonomously close his purchase tab at the establishment, and in order to perform remote electronic payment for the purchase tab to the establishment, without requiring involvement or assistant from waiters or establishment personnel.

Abstract: A system and method allow a customer to perform self-checkout at a real-world non-virtual store or restaurant or other business establishment that the customer is visiting. The customer pre-defines an electronic payment method. The customer visits the business establishment, and the system generates a unique user-specific code that is a function of the time, the location, and the specific customer. The code is displayed on the mobile device of the customer, which is then shown to an employee of the business establishment, which then enters the unique code into a Point of Sale terminal; thereby generating an association between an ongoing open tab of the customer, and the mobile device of the customer. The customer is able to perform self checkout of the open tab, without requiring action on behalf of the business establishment.