Mich. Comp. Laws § 551.110: License, certificate or certified copy record as evidence.

Sec. 10.

The record of any license to marry, or of any marriage certificate, in any county clerk's office, or a certified copy thereof, shall be prima facie evidence in any court or proceedings in this state, with the same force and effect as if the original were produced, both as to the facts therein contained and as to the genuineness of the signatures thereto.