An online Gift Registry Service provides registration of information for a gift registrant and allows access to the registry by potential gift giver users over a distributed public network, such as the World Wide Web. In addition, users tag items of interest at participating Service Provider sites and the Service Provider sites register these items with the Gift Registry Service on the user's behalf. A reminder service is provided to notify individuals automatically upon the trigger of certain events, such as important dates or product sales from online merchants. In addition, there are various occasion planning services available so that users can perform all the planning for the event online in the comfort of their home or office. Service Providers register system notification messages to be triggered on pre-determined events. In addition, Service Providers obtain marketing information to tailor their products and services.