Michigan Compiled Laws, Chapter 450. Corporations § 450.4103

Sec. 103. (1) One or more persons organizing a limited liability company shall sign the original articles of organization as organizers. The articles shall state the names of the organizers beneath or opposite their signatures.

(2) Any document other than original articles of organization required or permitted to be filed under this act that this act requires be executed on behalf of the domestic limited liability company shall be signed by a manager of the company if management is vested in 1 or more managers, by at least 1 member if management remains in the members, or by any authorized agent of the company. A document required to be executed on behalf of a foreign limited liability company shall be signed by a person with authority to do so under the laws of the jurisdiction of its organization. The document shall state the name of the person signing the document and the capacity in which he or she signs beneath or opposite his or her signature.

(3) A person may sign a document under this section as an authorized agent of a limited liability company. If the authorization is pursuant to a power of attorney, the power of attorney authorizing the signing of the document by the person need not be sworn to, verified, acknowledged, or filed with the administrator. A document signed by a person under this subsection as an authorized agent of a limited liability company shall state the capacity of the person signing the document.