Advice needed , does ex-FI have any rights?

I already told you the answer when you asked this question the other day. Common law marriage does not have anything to do with it and your thought process is wrong. Any legal action taken will relate to the purchase of real estate. You will have problems. If you wish to keep answer shopping for the one you want to hear rather than what is real, keep going. It is not my money that is on the line. If he sues, get a lawyer. And you want people to think he is the violent, illogical one?