Thanks for the feedback! I took the same road like Joel proposed (after making sure the mediator name is unique through createUID). I don't understand however that (Pure)MVC doesn't have support for something essential like this out of the box 

I'm struggling with the fact that I have multiple views of the same type in a tab navigator. The problem starts when calling proxy methods from the mediators attached to these views. The results of these methods are communicated through notifications. The problem is that ALL mediators get these notifications although only the mediator that called the proxy medthod is interested in the result. Is there some framework support for this or do I have to do my own plumbing?