Using a compatible printer cartridge does not affect the warranty unless failure or damage is attributable to it. Keep in mind that the ink does not come into contact with any part of the printer or its internal parts other than the cartridge itself and the print head. The ink is applied to the paper as the paper is fed through the printer.
Should your printer be damaged as a direct result of the cartridges (original or compatible) supplied to you by the Cartridge People, we will either replace or repair your printer free of charge under our Lifetime Printer Guarantee, please see the link below. Any hardware problems with the printer are still covered by the manufacturer’s warranty.