Apr 06, 2016 - 07:29 PM
Your legal options are limited, especially if he has "legal capacity." However, if his actions threaten his financial well-being, he may become a person in need of protection and you could file something in court to seek to be named as his guardian/conservator. A court would have the authority to take away his ability to manage his finances. Again, this can be quite difficult if he is deemed to have sufficient mental capacity.
Another option might be to have an intervention, as one may do for a loved one addicted to drugs, alcohol, etc.