With CareerPlug, you can easily track which of your applicants were referred by your employees, as well as send an email to follow up with those employees on the status of the applicants they've referred.

When you hire an applicant or move an applicant to inactive, you'll see the option to Send Update to Referrer if that applicant was referred by one of your employees.

Update referrer when someone is moved to Inactive

This will open up a customizable template to send to your employee regarding the new status of their referred applicant. 

Email to the referrer letting them know the status of the employee

More info: How do I utilize the employee referral program?