A grandparents' medical consent form allows a parent or legal guardian to hand over all responsibility regarding their child's healthcare decisions. Keep original signed form in the customer's case record.Attach a copy of signed. Grandparent Consent to Minor (Child) – Specifically for grandparents who will have the legal right to choose the medical treatment for a minor (child). INSTRUCTIONS FOR COMPLETING THE CFS 600-3. Line 1: Enter the name of the person giving consent. If you or a member of your family has a medical emergency, the physician will need a complete medical history.