Every licensee shall, within thirty days after service or knowledge of, notify the department of any suit or complaint served or filed in any court of competent jurisdiction, civil or criminal, in which the subject matter involves any auction or business activity of the defendant; and in which the subject matter thereof, involves any auction or business activity of the defendants therein named. The department address is Business and Professions Division, Auctioneer Section, P.O. Box 9649, Olympia, Washington 98507-9649. Complaints against others may also be sent to the above address.