Printer cartridges are among the most counterfeited consumables in the world, and the authentication technology you choose determines how well you can protect revenue, warranty programs and customer safety. This technical comparison examines NFC tags, QR codes and contact chips across five decision areas: security and cloning resistance, cost and implementation, user experience, durability in the cartridge environment, and hybrid deployment models. It closes with a practical selection framework and an implementation checklist so product managers, packaging engineers and brand protection teams can specify the right combination for OEM, remanufactured and high-value industrial cartridge programs.