Their cartridges absolutely will not void your printer’s warranty. A US federal law, the Magnusson-Moss Warranty Act, protects your right to use any of the cartridges we sell without their voiding your printer’s warranty. Furthermore, Inkfarm.com guarantees that their cartridges will not void your warranty. This is not an Inkfarm.com specific warranty, but one that governs all warrantied merchandise and goods sold in the USA.