Employers who require employees to take lie detector tests may be in violation of state and federal anti-discrimination laws. The Employee Polygraph Protection Act (EPPA) is a federal law that bars private employers from requiring potential or current employees to take lie detector tests. This law prohibits employers from using a polygraph during pre-employment processes or during the course of employment. Generally speaking, private Texas employers cannot use or inquire about lie detector test results to discriminate against an applicant or employee. However, the law does not apply to federal, state, and local government employees.
There also some exceptions in the private sector. Certain businesses, such as security firms and pharmaceutical companies, may lawfully require their applicants and employees to take lie detector tests. Additionally, some private employees who are suspected of financial crimes against the employer may be subject to a lie detector test.
The EPPA specifies that most people have a right to employment without being burdened with a lie detector test. In instances where a lie detector test is permitted, the employers must follow strict guidelines regarding testing conditions and procedures. For example, Texas requires that anyone who performs lie detector tests must be licensed. Additionally, the examiner must have professional liability coverage and abide by confidentiality rules.
Dallas Employment Lawyer Blog

