Mich. Comp. Laws § 449.104: Copartnership certificate; filing; assumed name, rejection by county clerk.

Sec. 4.

Persons now owning or conducting any such business as copartners shall file such certificate as hereinbefore prescribed within 90 days after this act shall take effect, and persons hereafter owning, conducting or transacting business as aforesaid shall, before commencing said business, file such certificate in the manner hereinbefore prescribed. The several county clerks of this state are hereby authorized to reject any assumed name which is likely to mislead the public, or any assumed name already filed in the county or so nearly similar thereto as to lead to confusion or deception.