An endorsement application can allow a user to endorse a product on a social network website when the product is purchased at a physical merchant point of sale terminal. Users of social network websites have been given the opportunity to endorse products that they have located or purchased online, but purchasers of products in person have not had that opportunity. The endorsement application can operate on a user's mobile device and can recognize a product purchased through near field or other communication using the mobile device. The application can isolate the product identification and product marketing data supplied by the point of sale terminal or other source and offer the user the opportunity to endorse the product on a social network website. If the user endorses the product, the application sends the endorsement to the user's account on the social network website for display to the user's community.