Wrongful Discharge from Employment Act (WDEA) is an Act enacted by the State of Montana in 1987 which statutorily modifies the employment at-will rule. Montana is the only U.S. state that has chosen to statutorily modify the employment at-will rule.
The Act preserves the employment at-will rule but at the same time lays out the legal basis for an action for wrongful discharge. Under the Act, a discharge is wrongful if it is in retaliation for the employee's refusal to violate public policy or for reporting a violation of public policy. If the discharge is not for good cause and the employee has completed the employer's probationary period of employment it will amount to a wrongful discharge. The act also lays down that a discharge is wrongful if the employer violates the express provisions of its own written personnel policy.