[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]:

We are writing to you today with mixed feelings, because our longtime partner, Dan Mellman, has announced his retirement from our firm after starting the company and leading us so well for 25 years. Although we are happy for Dan as he enters this next chapter in his life, we are also extremely sad because we will miss him terribly. Dan's last day with our company will be on Friday, April 30.

From a logistical standpoint, rest assured that our company's operations will continue as usual even after Dan leaves us. Dan has also mentioned that he will possibly continue to do some very minimal consulting work with us, so you will most likely continue to connect with him. Thanks, as always, for supporting our company throughout the various changes and milestones we have experienced.

Sincerely,

[Signature]

[Sender's first and last names]