Establishing paternity for child protective proceedings. Verkkothere are two main ways parents can establish paternity when they are not married:. Verkkounmarried parents can establish paternity one of three ways: • voluntarily by completing an affidavit of parentage form. This means they agree to name the father of the child; • either parent or a prosecuting attorney can ask the court to help. (1) if a child has a presumed father, a court may determine that the child is. Verkko“if a child has a presumed father, a court may determine that the child is born out of. Verkkoestablishing paternity voluntarily by signing an affidavit. The parents of a child.