When the president or other chief officer of any express company resides in this state, it shall be the duty of such company to post in a public and conspicuous place, at each office where it transacts business, the name of its president or other chief officer on whom service may be perfected in this state; otherwise, service made as provided for in Code Section 46-9-235 shall be deemed sufficient and proper service.
OCGA § 46-9-236