Mich. Comp. Laws § 570.591

Sec. 11. If a claim of lien recorded under this act has been paid, or if an action to enforce the lien has not been commenced within the time limitations of section 7, the real estate broker shall record a release of lien under section 5 within 5 days after a written demand by the owner of record or the owner's agent and provide a copy of the recorded release.