Mich. Comp. Laws § 565.241
Hereafter the affixing of an actual seal, a scroll or device used as a seal, the word "seal" or letters "L.S." after the signature of any individual, partnership or corporation executing any deed, mortgage, or other instrument affecting the title to real estate, or any interest therein, shall be unnecessary, and such instruments hereafter executed without affixing an actual seal, a scroll or device used as a seal, the word "seal" or letters "L.S." after such signatures, shall be construed to be sealed instruments and valid and effectual to convey the legal estate of the premises therein described, and the record of such instrument, if otherwise eligible to record, or a transcript thereof, may be given in evidence as in other cases.
MCL 565.241