From 10+ years experience performing background checks, we know that employers are looking to save both time and money when hiring. Saving time and money also means ensuring the right person is hired because employee turnover definitely puts a dent in hiring costs. At a minimum for all candidates, a national criminal background check is definitely on the list of recommended basic background checks. Some employers may do an internet search for a "national criminal check" and hope to find quality data to help with their hiring decision. Be wary.