An option to choose who your family is, both must consent. But never being able to remove them, only disown. You do not need the other players permission to disown them.
The option to make a "will" in game. Should someone stop playing Identity IRL or die IRL their items and properties can be transferred to someone of their choosing in their will. You can always update your will.
The way to know if a player has stopped would be if that players family member, or person in their will reports the player is inactive or has died. They would then have to wait 1 year before they could obtain their assets and items. Family members that are "disowned" cannot try to claim.
If a player is married and their partner reports that they have died or are inactive, they will also have to wait 1 year for inactivity before being able to claim items.
If a player has a will only the people in the will can recieve the assets. If the player has more than 1 family member it will Prioritize who is listed as their spouse, if no spouse, then child. If their family members are siblings, parents, cousins or aunts and uncles, it will go to who ever reported their death first.
This is a nice way to keep businesses running even once people are no longer playing, they can pass on their assets to someone else.
If a player comes back after a year they can dispute on having their things returned to them. After 2 years they can no longer dispute.