A grandparents' medical consent form allows a parent or legal guardian to hand over all responsibility regarding their child's healthcare decisions. Ensure your child's well-being with our easy-to-use child medical consent form.Using this form, you give permission to other adults to act for you, in your absence, regarding the treatment of your child. This is a legal document. Grandparent Consent to Minor (Child) – Specifically for grandparents who will have the legal right to choose the medical treatment for a minor (child). How do I fill this out?