1. With the help of third-party organizations, such as the three major signature certification bodies in the United States. There is no way to develop this problem. Interested Tibetan friends can refer to our tweet (occasionally WeChat official account article: Part 1: Beckett). Of course, even professional organizations sometimes make mistakes. But this truth is just like the graduates of Tsinghua Peking University are not all talents, and the key is that their comprehensive quality is the highest.
2. Find a professional boss. Big bosses often have a paranoid love for their favorite fields, and it is easy to understand that they are more professional than ordinary players. But in the same way, as long as a person can't escape the embarrassment of being deceived, no matter how experienced he is, he will face the problem of probability. In addition, the bosses may not have so much time to help you judge whether it is true or not. On the other hand, they really don't have this obligation.
3. Self-taught. Better to rely on yourself than to go to others for help. It is a happy thing to spend more time studying the signature habits, laws and history of your favorite players or idols. But this method is not suitable for friends who just want to buy something to give away.