Background check is a process by which a person or company uses to verify that a person is who they claim to be, and provides an opportunity for someone to check a person’s criminal record, education, employment history, and other activities that happened in the past in order to confirm their validity. The frequency, purpose, and legitimacy of background checks varies between countries, industries, and individuals. An employment background check typically takes place when someone applies for a job, but can also happen at any time the employer deems necessary. A variety of methods are used to complete such a check, from comprehensive database search to personal references..