An employer may use this policy to express its interest in remaining non-union. A written and published policy is a best practice for communicating this view. It is also helpful for the employer to have a written and published policy for defending against potential unfair labor practice charges alleging that the employer's communications on the subject contained threats or promises.
These charts illustrate the circumstances in which an employer may lawfully prohibit solicitation and distribution of union literature in its workplace.
HR guidance on how to prevent unions from forming.