Lexmark X264A11G Return Program Toner Cartridge - BlackGoing green has never been easier. Recycle all your used Lexmark supplies is simple, smart and always free. Lexmark Return Program cartridges are patented print cartridges sold at a discount in exchange for the customer's agreement to the license requirement that the cartridges will be used only once and returned only to Lexmark for remanufacturing and or recycling. The Return Program cartridges are licensed for single use only and are designed to