A repository server system supporting a one-click retrieval of user data over a communications network in fulfillment of the data requirements of a Web page form served to a user computer system by a Web page server, wherein said repository server system includes a data store that stores user data, wherein said repository server system provides said Web page form with a clickable user interface control as served to said user computer system, said control including a user data request, issuable by said user computer system and corresponding to said Web page form, wherein said repository server system is responsive to said user data request to provide a user data response, corresponding to said user data request, to said user computer system.