Character suffering from amnesia has created a new life for himself with a new lover, name, friends and place to live.
He will never ever get the memories of who he used to be back and at this point he doesn't want those memories back. He's very happy with who he has become.
His family has been looking for him for almost a year and finally someone stumbles across him.
Can the family force him away from his new life? I'm assuming they could probably get a judge to sign off on a non-voluntary psychiatric and physical evaluation? (He still shows some signs of his brain injury and has problems putting words in the right order, dealing with intense interactions,etc. so the family could argue that he's being taken advantage of in his new situation).
What type of testing would he be subject to?
If he's deemed mentally competent, I assume he's responsible for the debts and assets of his former life, and under no obligation to deal with his old family, or would he be forced to do some sort of mandatory counseling?
I'm just looking for the range of plausible here, not necessarily the most probable of those possibilities.
EDIT: The family he has is parents and siblings. No wife or children.