It has been observed that since your joining you are not performing up to the level that been expected, resulting to put you in the list of under performers, which is directly resulting in willful insubordination and gross negligence of duties, in your capacity as Operator.
Performing below the level is making yourself liable for necessary action.
You are hereby warned to develop your performance; failure to do so shall invoke appropriate action.
You are further advised to submit a written explanation on your poor performance as soon as you receive this letter.
Kindly treat this as very urgent.