Wis. Stat. § 948.25: Unauthorized interstate placements of children.

(1) Any person who sends a child out of this state, brings a child into this state, or causes a child to be sent out of this state or brought into this state for the purpose of permanently transferring physical custody of the child to a person who is not a relative, as defined in s. 48.02 (15), of the child is guilty of a Class A misdemeanor.

(2) Subsection (1) does not apply to any of the following:

(a) A placement of a child that is authorized under s. 48.98, 48.988, or 48.99.

(b) A placement of a child that is approved by a court of competent jurisdiction of the sending state or receiving state.