It depends on how the company goes about it. The larger the company, the more established the HR department. They may use their HR platform to conduct the check which may find any and everything. The smaller companies may only check recent background with a local firm. Price is the name of the game. The more in-depth the background check, the more it costs. If you are going to work in a bank or with kids, be prepared to for the company/school to use the state equivalent of the FBI. For mom and pop shops, they may just take your word on the application. If you see a national HR platform like Paycom, then the results can vary depending on the package the company purchases.