Normally, I don't undertake it, but it's normal to be a defendant. An enterprise that wants to join a chain store, it is best to search his trademark right to see if he is the exclusive owner of the trademark, otherwise it will not be able to operate for a long time. At present, China pays more and more attention to intellectual property rights. If there is infringement, there will be problems sooner or later. At the same time, pay attention to protect your rights and interests, and authorize you to have no trademark rights. This authorization contract itself is not established, and you can appeal for a refund.