I remember seeing advice to include a clause that makes their ownership of intellectual property contingent on paying you in full. It's easy to get them to agre

I remember seeing advice to include a clause that makes their ownership of intellectual property contingent on paying you in full. It's easy to get them to agree to up front, because they intend on paying you (or at least want to look like they do), so it's irrelevant as long as you get paid. If you don't, however, it means you have actual leverage and their BATNA is getting owned in a lawsuit.