1. An electronic receipt system comprising: a point-of-sale (POS) terminal having a near field communication (NFC) device for communicating with a mobile wireless communications device during a transaction for purchasing a plurality of items; and a server communicating with said POS terminal and comprising a processor and memory associated therewith for generating a product database comprising a plurality of item entries for a corresponding plurality of potential items for purchase, each item entry comprising a merchant identification number for a merchant selling a respective potential item for purchase, and a locater value for accessing the respective potential item for purchase on a website of the merchant selling the respective potential item for purchase, receiving a user identifier transmitted from the mobile communication device via said NFC device, verifying an enrollment status of the user identifier, based on results of the verifying, generating an electronic receipt associated with the transaction for purchasing the plurality of items, and generating a plurality of social media network link features in the electronic receipt and respectively associated with the plurality of items using the product database, each social media network link feature for sharing a purchase of a respective item on a corresponding at least one social media network, the generating comprising checking, for each social media network link feature, whether a respective item entry in the product database includes required data to generate a respective social media network link feature for the corresponding at least one social media network.