Mich. Comp. Laws § 552.625i

Sec. 25i. (1) If, after a financial institution forwards money to the state disbursement unit, all of the forwarded money is returned to the payer due to a mistake of fact or court order, the title IV-D agency shall reimburse the payer for a fee, cost, or penalty that the financial institution assessed against the payer under section 25g. The title IV-D agency shall also compensate the payer for the amount of interest that the financial assets would have earned had they not been converted and forwarded to the SDU, to the extent that the interest can be determined with a reasonable degree of certainty. (2) If the total amount of past due support the payer owes under all support orders subject to levy under section 25c is more than the amount of money a financial institution, insurer, or carrier forwards the SDU under section 25g, the SDU shall allocate the money among those support orders by multiplying the total amount of money forwarded by the percentages arrived at by dividing the past due support amount under each of those support orders by the total of the past due support amounts under all of those support orders.