\documentclass[11pt]{letter}
\usepackage[T1]{fontenc}
\usepackage{times}


\begin{document}
\begin{letter}{}
\date{}

\address{<Your Name>\\
         <Your Street Address>\\
         <Your City, State, Zip>}

\signature{<Your Name>}

\opening{To Whom it May Concern:}

I am writing in response to a direct mail/phone offer that I recently received
from your organization.  This offer is unwelcome because I am not interested
in any goods or services offered by your organization.  Should I ever become
interested in such goods or services, I will, of my own volition, seek out
your organization.

Therefore, I demand that you immediately cease and desist contacting me
with direct mail/phone offers, and remove my personal information from
your mail/phone lists/databases.  Should I receive any further unsolicited
correspondence from your organization, I will consider it an invasion of
my privacy and an act of willful harassment on your part, and I will take
appropriate action.

\closing{Sincerely,}

\end{letter}
\end{document}