Within a facebook app, is there a reliable way ensure, that a given action can only be performed once per facebook user, without asking the user to authorize the app?
From the looks of the documentation and the lack of positive responses to this question I would deduce it's impossible, but I have been told the adverse - without actual details.
So what I need to know:
Is there any way to achieve this?
or (if not):
Is there any resource that clearly states that this is impossible?