Well 1st thing a ProRes file can only be used on a FCP 6 workstation, nothing else. Not even FCP 5, so unless they are FCP and up-to-date that file is useless. Then DV is not really a broadcast standard, some stations will accept it but it is on the lowend of the SD scale. If I shot something with a RED camera and I found out it was delivered as a DV file for broadcast I would be PISSED! But hey that’s just me.
If you were sending out DBetas or even BetaSP tapes I wouldn’t recommend calling but anything like files I would, but then again that is me. I would rather waste a couple minutes on the phone than risk sending files that are not usable or incur some kind of extra processing charge for me or my client.