Some companies do a more thorough background check than others. The ones doing full background checks are often the companies with the most to lose or whom have the most security related holes to plug when it comes to employees with potential to cripple the company. Although the background checks are becoming so standard that the companies doing them are generating full background checks options without charging more than the less thorough options. With corporations they often give a discount on bulk checks, and offer better deals on the type of checks to get new business in and to maintain competitive rates.