Mich. Comp. Laws § 322.356: Ineffectual certificate of purchase; surrender, refund.

Sec. 56.

In case of any sale made by mistake, or not in accordance with law, or obtained by fraud, the same shall be void; and no certificate of purchase issued thereon shall be of any effect, but the holder of any such certificate shall be required to surrender the same to the commissioner, who shall thereupon refund the amount paid in the like funds received by him on such certificate.