Using compatible ink or toner cartridges will NOT void the warranty of your printer. Laws in the U.S. and Canada prohibits any company from abiding end users to purchase their products and prohibits a manufacturer from voiding a warranty for the reason of using alternative printing solutions. If you are a resident of the U.S. please refer to: Magnuson-Moss Warranty Improvement Act (U.S. Code - Title 15, Chapter 50, Sections 2301-2312). If you reside in Canada please refer Section 77 of the Canadian Competition Act.