That's actually an interesting question, and I don't ever recall seeing it asked before.
I can't imagine what grounds they could deny it on, but not being able to present (possibly) state identification throws an interesting twist into the question. I'm assuming that's why you're asking. He may not be able to "prove" where he lives legally, right?
I gotta be honest. I can't see them denying it, but it will be interesting to see the responses.