Can the application registration form be used as a background transfer authorization letter?

The application registration form can be used as a back transfer authorization letter. According to a query on Handan Yingcai.com, we learned that online back-checking can be done through SMS authorization. Online back-checking does not require authorization, and HR can conduct background checks on candidates at will. Online back-checking can be authorized by uploading an authorization letter. The application registration form with the candidate's signature can be used as an authorization letter.