My wife was informed via telephone on Friday that come Monday she will be written up as a disciplinary action. She has been told the reason for the written warning is that there have been complaints from some people she manages or has managed in the past regarding her abruptness when enforcing workplace safety rules. She was told that people have left the company because of her. Past incidents were not brought to her attention. She has received no previous verbal or written warnings. Is she required to sign the warning.She fears her job is in jeopardy. What is her recourse?