Very rarely and only under very unusual circumstances. Most often you cannot sue your employer. In return for “sure and certain benefits”, the laws in Washington prevent you from suing your employer. You are only entitled to the benefits from workers’ compensation. Therefore, it is important to ensure you receive all the available benefits. However, if a third party, someone who does not work for your employer, caused the accident, you may be entitled to sue them for additional benefits that are available in a personal injury case.