1. A method in a Presence System for authorizing a Watcher to access Presence information associated with a Presentity, the method comprising the following steps: a) receiving from the Watcher a request for said Presence information; b) acquiring instructions indicating that an authorization instance other then the Presentity shall be given an opportunity to change or verify an authorization rule associated with the request for presence information; c) notifying the authorization instance of the request for presence information, thereby enabling the authorization instance to change or verify the authorization rule, and d) making a final decision on the authorization rule on the basis of the instructions and a notification indicating a 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.