A licensee shall deliver to an individual supplied with a hearing aid, a receipt containing: The licensee's signature; The address of the licensee's regular place of practice; The licensee's license number; Specifications as to the amount charged; Other terms of the sale, stated clearly; and The manufacturer, model, and serial number of the hearing aid provided. If a hearing aid is not new, the licensee shall ensure that the receipt is clearly marked “used” or “reconditioned” and state the terms of any guarantee.