(1) False or misrepresented statements on application;

(2) Sale or transfer of ownership of agency;

(3) Conviction of any crime involving moral turpitude;

(4) Aiding or abetting any unlicensed person to engage in business as a collection agency;

(5) Publishing or posting, or causing to be published or posted, any list of debtors, commonly known as "deadbeat" lists;

(6) Collecting or attempting to collect by the use of any methods contrary to the postal laws and regulations of the United States;

(7) Having in his or her possession or making use of any badge, using a uniform of any law enforcement agency or any simulation thereof, or making any statements which might be construed as indicating an official connection with any federal, state, county, or city law enforcement agency, or any other governmental agency, while engaged in collection agency business;

(8) Distributing any printed matter which is made to be similar or to resemble government forms or documents, or legal forms used in civil or criminal proceedings;

(9) Advertising for sale or threatening to advertise for sale any claim as a means of endeavoring to enforce payment thereof, or agreeing to do so for the purpose of soliciting claims, except where the licensee has acquired claims as an assignee for the benefit of creditors or where the licensee is acting under the order of a court of competent jurisdiction;

(10) Engaging in any unethical practices or resorting to any illegal means or methods of collection;

(11) Using profanity, obscenity, or vulgarity while engaged in the collection of claims;

(12) Addressing a letter to or telephoning a debtor at his or her place of employment unless a good-faith attempt has been made to contact the debtor at his or her usual place of abode by letter and the mail has not been returned and no answer has been received; or

(13) Using violence or threats of physical violence while engaged in the collection of claims.