Mich. Comp. Laws § 445.1858: Certain provisions in written agreement as void and unenforceable.

Sec. 8.

Any of the following provisions contained in a written document made in connection with an extension of credit to an individual for personal, family, or household purposes are void and unenforceable:

A power of attorney to confess a judgment.

Unless otherwise expressly provided for by law, a waiver of a borrower's or buyer's rights under this act.

Except as authorized by this act, an agreement by a borrower or buyer to pay a penalty. Late payment and prepayment charges are not penalties.