Okla. Admin. Code § 45:10-3-14
Every Retail Spirit, Retail Beer, Retail Wine, Beer and Wine, Mixed Beverage, Caterer or Special Event licensee or employee purchasing alcoholic beverage shall, at the time of delivery of such alcoholic beverage and at no other time, demand and receive from the licensed Wine and Spirits Wholesaler selling such alcoholic beverage, and such licensed Wine and Spirits Wholesaler shall furnish and deliver in duplicate, a serially numbered invoice, purchase order or sales ticket truly and correctly showing the kind, brand, quantity and price of such alcoholic beverage purchased or sold, the date and place of purchase or sale, the name and address of the licensed Wine and Spirits Wholesaler and the name and address of the Retail Spirit, Retail Beer, Retail Wine, Beer and Wine, Mixed Beverage, Caterer or Special Event licensee. Such licensee shall keep one copy of each such invoice, purchase order, or sales ticket for a period of three (3) years thereafter, which shall be open at all times to inspections by the Commission, its deputies or agents, or any other law enforcing officer of the State of Oklahoma.
Okla. Admin. Code § 45:10-3-14