You may already know that Qtoner.us has led the industry for years with the comprehensive warranty commitment we put behind our products. In the unlikely event that you experience a problem with your printer that is determined to be caused by our products, you are covered by the full protection of the manufacture's warranty, including repair or replacement of your printer at no cost to you. It is also important for you to know that, despite some manufacturers scare tactics, your printer's warranty is not voided when you use compatible products. Federal law prohibits printer manufacturers from taking such an action, which would result in limiting your choice in supplies.