That's actually a pretty valid theory--phone calls leave no paper trails. So I checked the WGA STRUCK COMPANIES list just now:
http://www.wga.org/subpage_member.aspx?id=2537
and they ain't on it. So that eliminates THAT possibility.
Okay, NEXT possibility: you think maybe they want to give me a writing assignment??? But they've never seen my writing samples. (And my query wasn't exactly Shakespeare!

)
My concern is that if they don't have me sign a release, then neither side of the table has any protection. So I'm kinda hesitent.
This is one of the great fantasies -- that a release form somehow protects you.
Protects you how? A prodco makes you sign a release form to release *them* from the possibility of being sued by *you.* All they agree to is to read your work. They don't concede anything. They don't offer you or script any particular protection.
And it's not like a contract in which both sides hold a copy. There is only one original and they hold it. Even if you make a copy -- thinking that that would have some legal weight as proof of submission -- it's just a copy, and if the original, which they hold, somehow vanishes -- of what legal use would the copy be?
The thing sounds a little bit odd to me. I've never heard of such a thing. But then again, I've never heard of any scam that involved having you call either.
I suppose you can use a reverse directory to find out just who you're calling, before you do, if you're worried about it.
Obviously, they already have your address, so it's not as if you're exposing yourself to them by giving them access to your phone number by calling them.
So you have two choices -- you can call them and if, in the course of the conversation anything comes up that involves you giving them money, or of them "managing you" and recommending you or your script to an editing or rewriting service to get it just right for submission -- say "no thanks" and hang up.
Any deal that involves their managing you or being an agent or any other deal that might involve you contributing any money of any kind or paying any fees to anybody -- the answer should be the same. No, thanks.
Listen to what they have to say. If the words Xanu, the Reverend Moon, or our Lord Satan come up, you might consider exercising a certain amount of caution. Other than that, proceed accordingly.
Or you can just forget about it.
As I've said, it's a bit odd.
NMS