\documentclass[adr=jan,accentcolor=tud9c,twoside,logo=true]{tudletter}
\usepackage{ngerman}
\usepackage[applemac]{inputenc}
\usepackage{geometry}


\newcommand\dude{YOUR NAME{} }
\newcommand\section[1]{\vspace{1.5em} \noindent\textbf{#1} \\}

\begin{document}
%\newgeometry{textwidth=10cm,textheight=10cm}

\begin{letter}{%
	YOUR ADRESS 
%    \vspace{-10em}    
    }

  \setkomavar{subject}[Subject: ]{Certificate of Employment for \dude}
  \opening{\vspace{2em}}

This is to certify that \dude [is/was] an employee of the Intelligent Systems Institute of Technische Universit\"at Darmstadt in Darmstadt, Germany from YOUR_START_DATE up to YOUR LAST DAY as [GRADUATE RESEARCH ASSISTANT AND PHD STUDENT / POSTDOCTORAL SCHOLAR].

This certification is being issued to [Mr./Ms.] \dude for whatever legal purpose it may serve.

Given this	XXX-th day of [Month of issuance], [Year of issuance] at Technische Universit\"at Darmstadt in Darmstadt, Germany.

\vspace{15pt}
Best wishes, 
\vspace{5em}  


Jan Peters
\end{letter}

\end{document}
