Mich. Comp. Laws § 552.22: Disclosure of property.

Sec. 22.

Whenever the court shall think proper to award to either party any of the real and personal estate of either party, or any money in lieu thereof, such court may require either party to disclose on oath, what real and personal estate has come to either party by reason of the marriage, and how it has been disposed of, and what portion thereof still remains in the hands of either party.