When you buy your Lexmark 56F1000 Black Toner from Tonerworld, you can rest assured you are receiving genuine, quality product. Our customer service team is always available to help you should you have any questions regarding your Lexmark 56F1000 Black Toner. Our hassle free return policy insures that should you have any problems with your Lexmark 56F1000 Black Toner we will either replace it for you or issue a full refund.