Texas Business Organizations Code - BUS ORG § 3.203. Signature Requirement

(a) A certificate representing an ownership interest in a domestic entity must contain the signature or signatures of each managerial official of the entity that is authorized by the governing documents of the entity to sign certificated ownership interests of the entity .

(b) A certificated ownership interest that contains the signature of a person who is no longer a managerial official of a domestic entity when the certificate is issued may be issued by the entity in the same manner and with the same effect as if the person had remained a managerial official.