Enable Email Authentication and Email Reuse
You can allow returning candidates to claim email addresses as being genuinely their own by verifying either their date of birth or last name (depending on what information has been entered for that candidate in the past). When they enter the correct information, a verification code is sent to their email address to further verify ownership.
This feature adds another layer of security to email verification and the associated candidate profile. It also allows candidates to create new profiles even though the email address they used belonged to another candidate in the past. Once their identity is confirmed, candidates can move forward with the job application process.
If a candidate can't authenticate their ownership of an email address using last name or date of birth, it could mean the email address they're trying to use is currently assigned to another user in the system. This may have happened for several reasons, including scenarios where candidates made typo in Last Name and Date of Birth details, previous candidates made spelling mistakes when entering their email address, or perhaps a previous candidate lost the email address due to inactivity when their email provider recycled it.
When this happens, they're given the option of creating a new profile using that email address. A verification code is sent to their email address to further verify ownership, and they can then create the new profile. Once a new profile is associated with the email address, the previous candidate using that email address is marked as unverified.