Mich. Comp. Laws § 600.315

Sec. 315. (1) All writs and process issuing out of the court of appeals shall be styled: "In the name of the people of the state of Michigan," and shall run into and be executed in any county of the state. (2) The seal of the court of appeals affixed to, or impressed upon, any writ or process in any action or proceeding shall be conclusive evidence that the writ or process was issued by the court of appeals in all cases where such writ or process may be lawfully issued.