If the person served is not the sole owner of the lot of poultry meat, or does not have authority as agent for the owner to bring the lot into compliance, such person shall notify the officer by whom such lot is held, in writing, of the names and addresses of the owner and every other person that is known to him to claim an interest in the lot. Any person served is liable for any loss sustained by such owner or other person whose name and address he has knowingly concealed from such officer.