Another reason that bosses do not fire some problem employees is from a fear of retaliation. Sometimes the employer must be concerned about various types of action the former employee may take against the company, such as filing a wrongful termination suit: The terminated employee may take legal action in response to the firing. While laws vary in each country and jurisdiction, many employers keep extensive documentation of disciplinary action, evaluations, attendance records, and correspondence from supervisors, co-workers and customers in order to defend themselves in the event of such a suit. Additionally, the at-will employment contract, where the law permits, allows the employer to dismiss employees without having to provide a reason, though this has sometimes been challenged in court. As well, the employer may be concerned that the employee could make a negative report to public: by divulging things about the company to others, thereby hurting their business; or that the employee may disclose trade secrets: A former employee may remove materials or divulge confidential information from the former employer and use it with another employer or in an independent business.