1. Criminal records check
Provides criminal history for the applicant. Especially important for positions of trust/security. Should include national and county records.
2. Social security validation.
Ensures the candidate's social security number is legitimate and finds all names, including aliases and variations, dates of birth and address history associated with the social security number. This shows employers if the candidate has lived in undisclosed locations or under other aliases, which may reveal criminal records that wouldn't have been found otherwise.
3. Address history check
Traces previous addresses for the candidate. Finding out where a candidate has lived will make it easier to verify other research, and may reveal jurisdictions where criminal background checks should be performed.
4. U.S. terror watch list check
Most background checks will look to see if the candidate is on the U.S. terror watch list. Especially important for security jobs.
5. Sex offender registry check
Extremely important for positions of trust, this check is included with most background checks.