Abstract: The present invention provides a flexible and dynamic notification system. A service node acts as a contact proxy for a subscriber, wherein each subscriber has various actual notification addresses associated with different networks or communication terminals. For each subscriber, the service node supports a common notification address, which is used by various notification services to send notification messages to the subscriber. Upon receipt of a notification message to a subscriber's common notification address, the service node will send the notification message to an appropriate one or more of the subscriber's actual notification addresses. The actual notification address may be predefined or may be selected based on various criteria, including a defined subscriber profile or presence information associated with the subscriber. Different actual notification addresses may be selected at any given time based on the selection criteria.