Okla. Stat. tit. 18 § 1025
The registered agent of one or more corporations may resign and appoint a successor registered agent by filing in the name of each affected corporation a certificate with the Secretary of State stating the name and address of the successor agent, in accordance with the provisions of paragraph 2 of subsection A of Section 1006 of this title. There shall be attached to the certificate a statement of the affected corporation ratifying and approving such change of registered agent. The statement shall be executed and acknowledged in accordance with the provisions of Section 1007 of this title. Upon the filing, the successor registered agent becomes the registered agent of each corporation that has ratified and approved each substitution and the successor registered agent's address, as stated in each certificate, becomes the address of each such corporation's registered office in this state.
Okla. Stat. tit. 18, § 1025