Mich. Comp. Laws § 125.1607a: Pledge by corporation; validity; lien; filing or recording instruments not required.

Sec. 7a.

A pledge made by the corporation shall be valid and binding from the time the pledge is made. The money or property pledged and thereafter received by the corporation immediately shall be subject to the lien of the pledge without a physical delivery, filing, or further act. The lien of such a pledge shall be valid and binding as against parties having claims of any kind in tort, contract, or otherwise, against the corporation, irrespective of whether the parties have notice. Neither the resolution, the trust agreement, nor any other instrument by which a pledge is created need be filed or recorded.