When you choose to keep it completely confidential, it means that all companies that haven't submitted resumes can't find your resume during talent screening, and no other company can search for any relevant information about you. Your information is strictly confidential.
But for the position you submitted voluntarily, because you chose to take the initiative and sent your resume information, the company passively received your resume, so he has the right to consult your resume, so the resume unit you submitted can see your resume.
Generally speaking, no one can access your information for enterprises that you have not delivered. The detailed explanation is as follows