You do have a problem. He may come back later and claim half the company. He can claim verbal promises and will probably win. Best to have a lawyer draft a r

You do have a problem. He may come back later and claim half the company. He can claim verbal promises and will probably win. Best to have a lawyer draft a release and have the guy sign it. A friend of mine hired a contractor without a work for hire agreement. The guy came back later and claimed the software. It cost my friend $20k to get rid of him. And that was when $20k was real money. So my non-lawyerly advice is to always have some sort of simple document to protect yourself.