Mich. Comp. Laws § 446.58: Cappers, boosters, shillers or false bids prohibited.

Sec. 8.

At any such sale by auction, no person shall act as "bidder," or what is commonly known as a "capper,""booster" or "shiller," or offer or make any false bid, or offer any false bid or pretend to buy any article sold or offered for sale at any sale by auction.