If you have been appointed administrator over her estate by the county probate court you have the power to sign a bill of sale for you daughter car and handle her legal matters , if not you need to go see the probate judge and he / she will tell you everything you need to do, forms / paper work you have to fill out , you have to be bonded for the amount of her estate, provide the court with a list of everything she ownes, money in back , yeah all that and more .
i had to go through all this when my son died.

