Background checks provide valuable information for employers who are seeking details about a potential employer’s employment history, education, criminal record, credit history, etc., and there are several red flags that may disqualify an applicant. These include: a poor employment history; lying on a resume or providing a resume that contains inconsistencies; a criminal history; bad references; a poor credit history; a failed drug or alcohol test; a bad driving record; questionable social media activity; and working illegally in the United States.