Criminal History: Checks for past convictions, arrests, or pending cases, often at local, state, or national levels .

Employment Verification: Confirms past job titles, dates of employment, and sometimes performance or reasons for leaving.

Education Verification: Validates degrees, certifications, and attendance at claimed institutions.

Reference Checks: Contacts provided references to verify character or performance, though this is less formal.

Driving Record: Assesses traffic violations or license status for jobs requiring driving.

Professional Licenses: Verifies the status of required certifications or licenses.

Social Security Number Trace: Confirms identity and checks for aliases or address history.

Drug Screening: Tests for substance use, common in safety-sensitive roles.