A method that includes receiving, from a user device, a request for a listing of merchants; in response to receiving the request for a listing of merchants, sending, to the user device, data describing one or more merchants and respective initial geographic locations of the one or more merchants; receiving, from the user device, a user request for updating a geographic location of a particular merchant in the one or more merchants; sending a request for an updated geographic location to a computing device of the particular merchant; receiving, from the computing device of the particular merchant, data describing an updated geographic location of the particular merchant; and providing, to the user device, data describing the updated geographic location of the particular merchant.