Method and system for authorization of presence information

A Presence System for authorizing a Watcher to access Presence information associated with a Presentity, the Presence System comprising:

• a communication unit for receiving from the Watcher a request for said Presence information;
• an authorizing unit for acquiring instructions indicating that an authorization instance other then the Presentity shall be given an opportunity to set, change or verify an authorization rule associated with the request for presence information;
• a notifying unit for notifying the authorization instance of the request for presence information, thereby enabling the authorization instance to set, change or verify the authorization rule,
• the authorizing unit being further configured to make a final decision on the authorization rule on the basis of the instructions and a notification indicating a setting, change or a verification of the authorization rule, in case such a notification is received from the authorization instance, or on the basis of a default authorization rule of the instructions, in case no such notification is received, and wherein the authorization unit is configured to control the notifying unit such that the notification of an authorization instance is repeated for at least one additional authorization instance other than the Presentity according to the instructions, before the final decision is taken by the authorization unit.