How to Write an Application Using Letter Class of Latex

\documentclass{letter}
\signature{Your Name\\ \hspace*{1cm}Your Designation}


%address{Street \\ City \\ Country}
\date{} %to avoid printing date on top
\begin{document}
\begin{letter}{To, \vspace*{0.5cm}\\ The Person, \\ Company, \\ Address, \\ City-PIN \\ \vspace*{1cm} \textbf{Subject: My Application Subject:}}
\opening{Respected Sir or Madam,}
\begin{enumerate}
\item Your Contents in list or paragraph form
\item
\item
\item
\item
\end{enumerate}
\hspace*{4cm} Thanking You,
\begin{flushright}
\closing{Yours Sincerely,}
\end{flushright}
\vspace*{-1cm} Dated: \today
%\ps{P.S. Here goes your ps.}
\encl{
\begin{enumerate}
\item
\item
\end{enumerate}
}
\end{letter}
\end{document}

Note:

1. Red colored text to be replaced with your particulars
2. Comment green text if you don't want current date to be inserted
3. Modify this template to suit your style