Because this gives the candidate access to the case.

When you click the “Notify Candidate” button in Interfolio, the system sends an email, which you can customize, to the candidate, telling them that a case has been started for them. Even if the process in your department does not require the candidate to use Interfolio, the system requires that you notify the candidate at the start of a case, if you plan to grant them access to the case at any point. As a general rule, Opus recommends that you use this feature at the start of any case on which you see this button.

See Also

Opus Support Site Articles

Can I Notify Review Candidates When They Need to Take Action?

What Elements Should Be Included in a Candidate Notification Message?

How Does Candidate Certification Work in Interfolio?

Do I Have to Click the “Send Forward” Button?

Interfolio Help Center Articles

Notify a Candidate of Their Review