Mich. Comp. Laws § 565.39: Device used as seal; effect; application to official seals.

Sec. 39.

A scroll or device used as a seal upon any deed of conveyance or other instrument whatever, whether intended to be recorded or not, shall have the same force and effect as a seal attached thereto, or impressed thereon, but this section shall not be construed to apply to such official seals as are or may be provided for by law.