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.The affidavit shall include (form of affidavit – see example):. (1) The name and date of birth of the child;. Grandparent Consent to Minor (Child) – Specifically for grandparents who will have the legal right to choose the medical treatment for a minor (child). This article is the second in our series on Family Safety Planning. Print your last name, first name, and the first letter of your middle name. 2.