I want to sign rights over to my mother. I currently have full custody and the father has to have supervised visitation. My mother

You cannot "give away" the parental rights of the other parent in the Commonwealth of Virginia. If you would like for your mother to be able to have legal custody of the child, the right to make legal decisions including "signing papers" as you indicate, you would have to go to court and be heard. You need to file a motion to amend custody. If you and the mother have an agreement that you are going to share legal custody of the child, you can present that agreement to the judge. However, you need to give the child's father notice of that proceeding and he is entitled to be heard. So if he objects, you will both have to present evidence as to why it is in the child's best interest for you and maternal grandmother to share legal custody of the child. For specific advise as to your situation, please consult an attorney in your area. This is presented for informational purposes only and does not create an attorney client relationship.