C.R.S. § 12-230-205: Retention of records - licensee's obligation.

Each licensee who sells a hearing aid or provides goods or services to a customer shall develop a written plan to ensure the maintenance of customer records. The records must be retained for at least seven years and identify the customer by name; the goods or services, except batteries, minor parts, and accessories, provided to each customer; and the date and price of each transaction.