Mich. Comp. Laws § 552.680: Payments made and received pursuant to order of income withholding; validity of support order; more than 1 support order in effect for support of 1 person by same obligor.

Sec. 10.

An order of income withholding under this act shall direct payment to be made to the office of the friend of the court or the state disbursement unit, as appropriate. The office of the friend of the court or SDU shall promptly transmit payments received pursuant to an order of income withholding based on a support order of another jurisdiction entered under this act to the agency or person designated in section 6(2)(e)( iii ).

A support order entered pursuant to section 6 does not nullify and is not nullified by a support order entered by the court in this state pursuant to another law or a support order entered by a court of another state. If more than 1 support order is in effect for the support of 1 person by the same obligor, then amounts collected by income withholding and credited against an amount owing for a particular time period under any 1 order shall be credited against amounts owing for the same time period under all such orders.