My father is in a nursing home. The state gave power of attorney to his sister while I was a minor child. Can I take over as power of attorney How do I go a bout it. None of his siblings ever visit and any money he receives is never spent on him.. I am the only one who purchase anything for him, clothing, etc. He also received money from a Native American Tribe, which NONE has been spent on him. We believe it has been used for the siblings own benefit.