[Your letterhead, if desired; if not, your return address]

[Date of letter-month, day, and year]

[Recipient's first and last names]
[Company name]
[Street or P.O. box address]
[City, State ZIP code]

Dear [recipient's name]:

I am writing to you confidentially to seek resolution of a highly challenging situation in our office. My manager, Carla Morrell, has been exhibiting questionable behavior toward me and some other colleagues on our team. Given the nature of the situation, I am not at liberty to discuss the details in this letter. I would prefer to meet with you in person to provide the details.

Therefore, please call me as soon as possible so that we can arrange to meet at your earliest convenience. I look forward to hearing from you soon, and thank you in advance for your prompt attention to this important matter.

Sincerely,

[Signature]

[Sender's first and last names]