Certified Auctioneers Institute. The professional designation awarded to practicing auctioneers who meet the experiential, educational and ethical standards set by the National Auctioneers AssociationAn association of individual auctioneers united to promote the mutual interests of its members; formulate and maintain ethical standards for the auction profession; promote the enactment of just and reasonable laws, ordinances and regulations affecting auction selling; make the public more aware of the advantages of auction selling; and generally improve the business conditions affecting the auction profession. More Education Institute.