\documentclass[adr=/Users/peters/Dropbox/Admin_IAS/LetterDetail/jan,accentcolor=tud9c,twoside,logo=true]{tudletter}
%\documentclass[ngerman,accentcolor=9c,premium=true]{tudaletter}

\usepackage{setspace}



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

\begin{document}
%\newgeometry{textwidth=10cm,textheight=10cm}
%\LoadLetterOption{/Users/peters/Dropbox/Admin_IAS/LetterDetail/IAS-Fromaddress} 

\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] a PhD student at the Department of Computer Science (FB Informatik) of Technische Universit\"at Darmstadt in Darmstadt, Germany. He/She is expected to graduate in 20XX. 

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

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


Jan Peters
\end{letter}

\end{document}
