\documentclass{article}
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\begin{document}
\scriptsize
FROM-NAME\\
FROM-STREET ADDRESS\\
FROM-CITY, STATE, \ ZIP

\vspace{1.0in}\large
\setlength\parindent{0pt}

\begin{center}
	\pbox{0.4\textwidth}{
TO-NAME\\
TO-STREET ADDRESS\\
TO-CITY, STATE, \ ZIP
}
\end{center}

\end{document}
