How would you approach creating a negative message for a superior.

2 answers

How to create a negative message to a superior?

Get lost.
Take a hike.

Are those negative messages? Negative messages are easy, it is avoiding them that is the challenge.
http://owl.english.purdue.edu/handouts/pw/index.html#sub6

Be sure to pay attention to Tone in Business Writing, along with the others.

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