Mich. Comp. Laws § 462.221: Stock as personal estate; transfer.

Sec. 221.

The stock of a railroad company is considered personal estate and is transferable in the manner and under such restrictions and conditions as may be provided for in the by-laws, but any certificate of stock issued before payment in full, shall show on its face, or by indorsement, the amount paid thereon. A share of stock shall not be transferred on the books of the company until paid in full, without the consent of the board of directors.