I can see why they have put the pass holder information on, as who is to know if anyone is putting multiple votes in for either side. Downside to it, it goes away from being a secret ballot.
I know this may be jumping the gun a little, but who is actually counting the ballot papers? Potentially some could be "Lost" if they don't have the correct answers on couldn't they. My trust of what has happened so far, makes it so i wouldn't be at all surprised one bit if this happened.
Given that it is so important couldn't they have:
(a) used an independent third party,
(b) sent out ballot papers in the post, and
(c) requested ballot papers be returned through the post to the independent third party
