In Wisconsin, there is a presumption of paternity based on the fact that the parties are married. Even if the parties have been separated for months, or even years, Wisconsin law presumes that any child “of the marriage” is the child of both parties.
The marital presumption can be overcome by results of genetic testing that show that a man, other than the husband, has a 99% probability of being the father.
In marriages where there is a dispute of this nature, the court will almost always appoint a Guardian ad Litem to investigate the matter. Guardian ad Litem’s are appointed on cases where there is a placement or custody dispute, and their job on the case is to represent the best interests of the child.
The Guardian ad Litem will typically recommend that the court order genetic testing at the first appearance for the mother, the child, and the husband to find out if the child is related to the husband. This is ordered immediately, because the parties must present an Order for Genetic Testing to the Child Services Agency to do genetic testing through the court.
If the genetic testing proves that the child is not the husband’s, the Guardian ad Litem typically advises the mother begin a paternity action against the biological father, so that the child has a legal father in his or her life. A court will not typically overcome the marital presumption unless there is an adjudication of a legal father.
Please note, if the couple is LEGALLY separated (meaning the couple has been granted a legal separation by the court), then there is no presumption that the husband is the father.
If you are concerned about the paternity of your child and are subject to the marital presumption in Wisconsin, it is in your best interest to seek legal counsel to resolve this issue as soon as possible.