Actually I didn't send anyone to the forums, Funvertising made me an offer, so they had a look at the demo even before we started to communicate. But this is not a thread about Funvertising, this about the steps to take, to ensure that both parties are satisfied.
And speaking about the world we live in, we live in a dog-eat-dog world. I don't care if there is an NDA or whatever, if I send my game to someone, they can just modify it to make their own, and if I'm in Latvia and they are far away, I don't wish to waste my time proving something.

By this whole post, I have come up with only one sure way for me to go, and that is make a trial of my game to send to a publisher, and that's it.