Mich. Comp. Laws § 565.21: Unacknowledged deed; filing of copy by person interested; effect.

Sec. 21.

A person interested in a deed that is not acknowledged may at any time before or during an application to the circuit court file in the office of the register of deeds of the county where the lands are situated, a copy of the deed compared with the original by the register, which shall in the case of proceedings before a court of record, for the space of 10 days after the first day of the next term of the court, have the same effect as the recording of the deed, if the deed shall, within that time be duly proved and recorded.