LabelWriter™ printers require specially treated thermal direct labels that are not compatible with any other printing technology. These thermal direct labels must be compatible with DYMO Printers and stored properly. We recommend that you use authentic DYMO LabelWriter™ brand labels to ensure compatibility and quality. Other brand labels may not work properly with your printer or may damage it and void your warranty. Please contact DYMO Consumer Service if you need help with selecting the right labels for your LabelWriter™.