Wisconsin Statutes Marriage and Family (Ch. 765 to 770) § 767.041. Full faith and credit; comity

(1) Actions in courts in other states. (a) Full faith and credit shall be given in all courts of this state to a judgment in any action affecting the family, except an action relating to child custody, by a court of competent jurisdiction in another state, territory, or possession of the United States, when both spouses personally appear or when the respondent has been personally served. Full faith and credit shall also be given in all courts of this state to the amount of arrearages owed for nonpayment or late payment of a child support, family support, or maintenance payment under an order issued by a court of competent jurisdiction in another state, territory, or possession of the United States. A court in this state may not adjust the amount of arrearages owed except as provided in s. 767.59(1m).

(b) Full faith and credit shall be given in all courts of this state to a determination of paternity made by any other state, whether established through voluntary acknowledgment or an administrative or judicial process.