It's been some time since I last used announcements. I had the impression that one of the benefits of announcements is that every object can play the role of an announcment. So I would expect the following to work | ann | ann := Announcer new. ann subscribe: Object do: [ Transcript show: 'received object announcement' ]. ann announce: Object new asAnnouncement As this is not working I wonder what is a good approach to wire my own model with announcements. Deriving my model from Announcement is not an option. And I'm a little bit reluctant to create yet another hierarchy of Announcement class just for the purpose of signalling them. The classes I like to announce are commands anyway so they are already suited for transmission. So what are the options? Override Object>>#handles: ? thanks, Norbert