Although some parents do not feel it is a necessary part of the hiring process, running a nanny background check on potential babysitters is a great way determine the best candidate. After receiving consent to the screening and having the individual sign a release of information form, information like photo ID, social security number and address information should be collected. The nearest state facility can provide a background check with possible fingerprinting. Doing so can provide critical details like if the applicant is a registered sex offender or if any convictions exist that could endanger the child or children. In most cases, a small fee is charged for the service and the timing can range anywhere from a few days to several weeks.