Mich. Comp. Laws § 554.635: Notices.

Sec. 5.

A lessor may cure a violation of section 3 by giving written notice to all tenants who are currently parties, with the lessor, to a rental agreement which contains a prohibited provision. The notice shall state that the provision is void and unenforceable or alter the provision to bring it into compliance with this act.

A lessor may cure a violation of section 4 by giving written notice to all tenants who are currently parties, with the lessor, to a rental agreement which does not include a required statement. The notice shall set forth the statement as provided in section 4.

Notices under this section may be given personally or sent by first class or certified mail to the tenant at the address of the leased premises.