Date: ______ [DATE]
[NAME AND ADDRESS]
[STATE CONTEXT AND NATURE OF BAD PERFORMANCE, CITING ALL WARNINGS GIVEN, ex. As you know, customer relations is key to the survival of our business. It thus alarms me when I receive several complaints from key customers which involve impoliteness and rudeness on your part. You will recall my letter of June 1 and our meeting last week in which I informed you that this type of behavior is unacceptable and urged you to change your behavior. Unfortunately, however, I have continued to receive such complaints.]
I am forced, therefore, to terminate your employment as of [DATE, ex. July 30, 2015]. [STATE ADDITIONAL TERMS OF TERMINATION, ex. Your company medical insurance plan will also be terminated at that time.] I regret that matters could not have been redressed in a more amicable manner.