In the administration of this act, the Attorney General may accept an assurance of voluntary compliance with respect to any method, act or practice deemed to be violative of the act from any person who has engaged or was about to engage in such method, act or practice. Such assurance may include a stipulation for voluntary payment by the alleged violator providing for the restitution by the alleged violator to any person in interest of money, property or other things received from them in connection with the violation of this act. Any such assurance shall be in writing and be filed with the court. Such assurance of voluntary compliance shall not be considered an admission of violation for any purpose. Matters thus closed may at any time be reopened by the Attorney General for further proceedings in the public interest.