This letter informs a company about an employee who has been behaving in a way that casts the company in a bad light.
1234, Main Street
Boston, MA 02123
31 March, 2005
<Recipient Address Goes Here>
Normally, I don't like to point fingers at people, but since I have been a customer of <company name> for <time you've been a customer>, I felt it necessary to contact you. Your <person's position>, <name> has been <description>
<your wishes for the employee>, but I felt you should know what's going on. If you have any questions, please don't hesitate to contact me.
encl: <List of enclosed items goes here>