Alert: Avoid Unauthorized LC521/527 Brother Cartridge Clones from China’s Ninestar!

Brother LC521/527 cartridges must be genuine to ensure printer performance and warranty protection. China-based Ninestar, which produces unauthorized clones, is on the U.S. forced-labor Entity List under the Uyghur Forced Labor Prevention Act. Products from Ninestar and its subsidiaries are banned from U.S. import and involve forced labor or infringe intellectual property. Consumers and resellers risk legal, ethical, and performance issues if they buy these cartridges—stick to genuine Brother supplies or fully verified remanufactured alternatives.