Oklahoma Change of Registered Office or Change of Registered Office and Principal Office (by agent) is a process in which a corporation in Oklahoma changes either its registered office or both its registered office and principal office. The registered office is the address where the Oklahoma Secretary of State will send all legal documents and notices. The principal office is the primary place of business for the corporation. The process of changing the registered office or both the registered office and principal office requires filing a certificate of change with the Oklahoma Secretary of State. The certificate must be signed by an officer or agent of the corporation and be accompanied by the applicable fee. The types of Oklahoma Change of Registered Office or Change of Registered Office and Principal Office (by agent) are: 1. Change of Registered Office: This type of filing changes the registered office address of the corporation. 2. Change of Registered Office and Principal Office: This type of filing changes both the registered office address and the principal office address of the corporation.