People can make mistakes and systems do not always work. Sometimes information can be recorded in the wrong way when created. Both the Employer and background check company should always give the applicant the opportunity to review any discrepancy between what is reported in the self-declaration form and what is found by a background check!
Background checks show the discrepancies between a candidate’s claims as provided in the CV and self-declaration form and the information reported by independent sources such as court records, prior employers, schools, and government agencies. A background check will simply corroborate what is stated by the candidate.