Safe. Contract Lock is a platform that provides users with integrated services of electronic signing and seal management, allowing all users to sign contracts safely and effectively anytime, anywhere on mobile phones, PADs, PCs or WeChat. Before signing an electronic contract through a third-party electronic signing platform, real-name authentication is required, so you need to fill in the ID number. Contract Lock has cooperated with several CA digital authentication centers to provide real-name authentication services for enterprises and individual users. By issuing a digital certificate that cannot be tampered with, the identity of the online signing is guaranteed to be legal and effective, and the legitimate rights and interests of both parties are guaranteed. So it is safe.