The commission may sue and be sued in its official name, and shall have a seal which shall be affixed to certified copies of records and papers on file, and to such other instruments as the commission may direct, and all courts shall take judicial notice of such seal. Copies of records and proceedings of the commission, and of all papers on file in its office, certified under the said seal shall be received as evidence in all courts of record. The office of the commission shall be at Jefferson City.