Wis. Stat. § 769.503: Compliance with multiple income-withholding orders.

If an obligor’s employer receives multiple orders to withhold support from the earnings of the same obligor, the employer shall be considered to have satisfied the terms of the multiple orders if the employer complies with the law of the state of the obligor’s principal place of employment to establish the priorities for withholding and allocating income withheld for multiple child support obligees.