The commission shall adopt a seal, which may be either an engraved or ink stamp seal, with the words "State Auctioneers Commission, State of Georgia" and such other devices as the commission may desire included thereon, by which it shall authenticate the acts of the commission. Copies of all records and papers in the office of the commission certified by the signature of the commission chairman and the seal of the commission shall be received in evidence in all cases equally and with like effect as the originals.