In this case, there are few cases that are not genuine. After all, people who sell fakes don't have to smash their own signs. Even if you do buy a fake one, it will be much more convenient to handle.
Many flagship stores authorized by brands are brand authorization letters.
The logo of the store is a sign without official authorization, and many stores cooperate with brands. This is quite common. Sometimes you will find that there may be many brands of things for sale in a store. In a sense, it is also a brand marketing to let more people know about their products and sell them better. In fact, there are many frauds in such shops, and there have been news reports about flagship stores before. Then, according to the punishment, the customer will be fined ten times, and the platform will seal up its store. There are many such examples, and I won't list them one by one.