Wis. Stat. § 53.42: Registration of guardianship of the estate orders.

If a guardian of the estate has been appointed in another state and a petition for an order to appoint a guardian of the estate is not pending in this state, the guardian of the estate appointed in the other state, after giving notice to the appointing court of an intent to register, may register the order appointing the guardian of the estate in this state by filing as a foreign judgment in a court of this state, in any county in which property belonging to the individual subject to the guardianship of the estate is located, certified copies of the order and letters of office and of any bond.