A Social Security Number (SSN) is required to identify addresses or aliases that a candidate has used, and to serve as pointer information for additional searches. Using the SSN, Checkr can find locations where candidates have lived or worked, using existing data from credit bureaus and other databases.
If there is an SSN-related exception, then Checkr will reach out to the candidate to collect additional information. The most common reason an exception would be generated is when the candidate submits information with a typo.
Lastly, the SSN can sometimes assist in determining whether a particular record belongs to the candidate if the SSN is available in the court file.