A Checklist of issues and obligations for employers to consider when investigating employee misconduct and determining whether to discipline or discharge a unionized employee. It addresses special obligations for private sector employers that conduct investigative interviews of, and discipline, unionized employees. These obligations flow from the National Labor Relations Act (NLRA) as enforced by the National Labor Relations Board (NLRB), and collective bargaining under the NLRA. Labor law in the private sector is primarily governed by federal law, including the NLRA and the Railway Labor Act (RLA), and this resource only covers the NLRA.