Mich. Comp. Laws § 28.430: Theft of firearm; report required; failure to report theft as civil violation; penalty.

Sec. 10.

A person who owns a firearm shall, within 5 days after he or she knows his or her firearm is stolen, report the theft to a police agency having jurisdiction over that theft.

A person who fails to report the theft of a firearm as required under subsection (1) is responsible for a civil violation and may be fined not more than $500.00.