If there is ever a question as to who the father of a child is, a paternity action may be filed in court to determine the true identity of the father. Most of the cases taken to court are by the mother of the child who wants to prove that a certain man is the father so that there can be some financial assistance by the father for the child’s upbringing. However, there are times when a man will want paternity action to establish that he is the biological father of a child. This can be done when the father seeks to obtain legal rights, such as custody or visitation rights. If a husband has a reason to believe that the child his wife gave birth to is not his he may file a lawsuit to prove he is not the father.