A background check is a process a person or company uses to verify that a person is who they claim to be. Background checks provide an opportunity for someone to check a person's criminal record, education, employment history, and other past activities in order to confirm their validity.Companies start the background verification by calling your last employer. They'll check the details you gave them against data from your last company. Then, companies look into public databases (criminal records) for any illegal activity. Next, they dig education records to verify your degrees and certificates.
As you can undoubtedly see, one of the most important reasons to conduct employment background checks on prospective employees is to protect yourself and prove that you have in fact taken the appropriate measures to ensure that this employee will not be any type of risk to you/your client or the workplace.