it does look like an open/shut case. and without knowing full details this would also be my first reaction. But IMO it's still worth talking to (2 or 3) lawyer

it does look like an open/shut case. and without knowing full details this would also be my first reaction. But IMO it's still worth talking to (2 or 3) lawyers which specialize on the subject[1]. It gets expensive only if you decide to fight - and you don't need to make that decision just yet. Just asking a legal expert to review your case isn't going to be outrageously expensive, but gives you a better understanding for deciding if this is worth any risks. And it would give you also a clear picture about how to protect yourself for any future ideas. [1] I have a rule which served me well. Interview (review) any legal adviser, accountant or consultant that you might want a professional relationship with. After talking to several people you know exactly the questions to ask them to decide if they are a good match for you. Also ask them for client references and a sample invoice they have issued for similar cases. Do these discussions always in person (over a coffee) never online. The first consultation has always been free for me (idk how it is in the US though).