Mich. Comp. Laws § 600.3344

Sec. 3344. Any married woman may release her right, interest, or estate to her husband and lawfully acknowledge this release. If the release is executed outside of this state it shall be executed, acknowledged, and certified as the laws of this state require for the execution, acknowledgment, and certification of deeds in any other state, territory, or district of the United States. Upon the release the shares of the sale arising from her contingent interest shall be paid to her. This release shall be a bar to her right, estate, or claim.