Before hiring a caregiver, nanny or babysitter, it is important to conduct a nanny background check that is designed to validate criminal history and confirm other critical information. The first thing a parent should do is to make sure the candidate that is being evaluated can provide a government-issued photo ID. Once the identity is verified, the next step is to request a nationwide search for police records that will reveal whether the person has been convicted and/or has obtained a pardon for a sexual offense.