how to make a strong warning letter

[francycham]

one employee directly complained to the top management about his immediate supervisor. He said that his immediate supervisor is not attending his problems and not finding the solutions to sort out his problems. Now his supervisor wants to issue him a warning letter saying that not to repeat such act.

How to make this warning letter? please help.

[Tdol]

If this is an official warning, then isn't there a standard company format for such warnings? If it's not official then it I don't really think that the wording really matters as an unofficial warning lacks force. If the person has complained to the top and gets a threatening letter, he'll oprobably do the same again and complain about the letter.