Wis. Stat. § 769.614
Within 30 days after issuance of a modified child support order, the party obtaining the modification shall file a certified copy of the modified child support order with the issuing tribunal that had continuing, exclusive jurisdiction over the earlier child support order, and in each tribunal in which the party knows that the earlier child support order has been registered. Failure of the party obtaining the modified child support order to file a certified copy as required by this section subjects the party to appropriate sanctions by a tribunal in which the issue of failure to file arises, but that failure has no effect on the validity or enforceability of the modified child support order of the new tribunal of continuing, exclusive jurisdiction.
Wis. Stat. § 769.614