1234, Main Street
Boston, MA 02123
01 April, 2005
<Recipient Address Goes Here>
I became a customer of <company name> <time you became a customer>. While I have found your service useful, I must inform you that I am cancelling my account, effective immediately.
I thank you for your services in the past. Please cancel my account immediately. If you have already billed me for this month’s service, <disposition of bill>. Thank you for your kind attention.
encl: <List of enclosed items goes here>