A method and apparatus for a navigation system for generating a reminder message by applying predefined validation rule to display and/or voice announce the reminder message associated with a particular location. The method includes the steps of creating reminder message data which include a reminder message, a primary location, a secondary location, and a validation rule; comparing a reference location with the primary location; applying the validation rule in the reminder message data to determine whether a relationship between the primary location and the reference location satisfies the condition in the validation rule; displaying the reminder message when the condition is satisfied; and conducting a route guidance operation to reach a location selected by the user.