Yes. The default in state law, called “intestacy,” is designed with married couples in mind. If a married couple dies without any estate plan, the survivor will get a good portion of the assets left behind. However, if you are unmarried, unless you are in a state that legally recognizes domestic partnerships or civil unions and you have registered as such, the survivor would get nothing. Instead, the family of origin of the unmarried partner who died would get anything in that partner’s name, including bank accounts, real estate, etc.