First, it is as easy for a star signing company to ask a star to sign it as it is for someone to sign it.

Second, the star's signature is very artistic. Instead of letting the signer imitate, it is better to let the star sign directly. It's not necessary at all.

Third, the star is an industry that depends on the audience to eat. They won't cheat their customers and lose their jobs.

I can't think of anything else at the moment, but I saw it when I went to idolize. I took some photos of the stars and said, "Sign some names and give them to the audience later." Get it done in one word. There is no need to cheat.