DATA PROCESSING APPARATUS THAT REGISTERS INFORMATION NOTIFICATION DESTINATION AND METHOD THEREFOR, AND STORAGE MEDIUM

A capable of preventing reception and processing of large data acquired based on a query string, thereby making it possible to prevent data reception and processing from affecting another event notification or registration request processing performed by the data processing apparatus. When a query string determination section determines that destination information for identifying a notification destination contains a specific character string, an event notification destination registration-determining section determines that the notification destination of information concerning the data processing apparatus is not to be registered in an event notification information-storing section. A Web service response-returning section returns a response indicating that the notification destination has not been registered, to an information processing apparatus connected to the data processing apparatus.