You can gather a variety of information about applicants for employment. After employed, additional information accumulates about the employee's performance, health, family and other personal issues. Growing concern over the possession of this data has contributed to states and the federal government developing laws governing the privacy of employer records.
For privacy reasons, files related to employee financial matters, such as wage assignments, garnishments, credit inquiries, etc., must be kept in a confidential file separate from an employee's personnel file. Access to this confidential file should be granted only to those people in your organization who have a legitimate need to know the information.