[Your letterhead, if desired; if not, your return address]
[Date of letter-month, day, and year]
[Recipient's first and last names]
[Street or P.O. box address]
[City, State ZIP code]
Dear [recipient's name]:
I am writing to notify you that effective with the December 2010 issue of my subscription to your magazine, I will be terminating my subscription to this publication. Therefore, please do not renew my subscription at that time, and please remove my name and contact information from your database.
I have enjoyed being a subscriber over the past two years, and thank you for the information you provide. Please contact me as soon as possible if you have questions about this subscription termination or if you need additional detail to process it. Thanks in advance for processing this request.
[Sender's first and last names]