If a person dies and has a will and someone says that the person "says" that they can have certain stuff .

Yoiur question is not a family law matter, but a wills, trust, and estates question.  I suggest a call to a practitioner in that field, but you will have to fill in a lot more facts -- the question is so vague that it is hard to tell what happened, why, who the actors are, or precisely what the question is.