LATEX : Swiss Letter

gistfile1

\documentclass[fontsize=12pt,paper=a4]{scrlttr2}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[german]{babel}

\LoadLetterOption{SN} %Swiss Letter standards
\KOMAoptions{
  enlargefirstpage=true, % letter should hold on one page	
  headsepline=false,
  footsepline=true,
  %pagenumber=botcenter,
  parskip=full, %False for paragraph first line indent
  firsthead=true, %This option determines whether the letterhead will be typeset at all
  %fromalign=left,
  fromrule=false,
  %---------------
  fromphone=true,
  fromfax=false,
  fromemail=true,
  fromurl=false,
  fromlogo=true,
  %---------------
  addrfield=true,
  backaddress=false, %Delete if not window enveloppe <--
  %--Subject------
  subject=beforeopening,
  subject=left,
  subject=titled,
  %---------------
  %locfield=wide  %Bank account, additional information
  %--Pliage-------
  foldmarks=true,     %Pliage
  %foldmarks=BhlmpTv, %Top and bottom = pli en 3
  foldmarks=bhlmPtv,  %Mid = pli en 2
  numericaldate=false,
  %refline=narrow
}

%\setkomavar{backaddress}{Backaddress} %return address for window  enveloppe
\setkomavar{backaddressseparator}{, }
\setkomavar{ccseparator}{, }
%\setkomavar{customer}{client number}
\setkomavar{date}{17. November 2012}
\setkomavar{emailseparator}{: }
\setkomavar{enclseparator}{: }
\setkomavar{faxseparator}{: }
\setkomavar{fromaddress}{Zentralstrasse 2\\ CH-2502 Biel}
\setkomavar{frombank}{12345}
\setkomavar{fromemail}{anton.koud@sunrise.ch}
\setkomavar{fromfax}{12345}
%\setkomavar{fromlogo}{\includegraphics{*.eps}}
\setkomavar{fromname}{Anton Kudryavtsev}
\setkomavar{fromphone}{078 848 10 48}
\setkomavar{fromurl}{}
%\setkomavar{invoice}{invoice number} %Invoice number
%\setkomavar{location}{More information about sender} % <-- Additional info about sender
%\setkomavar{myref}{1234}
\setkomavar{place}{Biel}
\setkomavar{placeseparator}{, den }
%\setkomavar{placeseparator}{, le }
\setkomavar{phoneseparator}{: }
\setkomavar{signature}{Anton Kudryavtsev}
%\setkomavar{specialmail}{A-Post}
\setkomavar{subject}[]{\bfseries{Garantiebrief für Eugene Kudryavtsev}} 
\setkomavar{subjectseparator}{: } 
%\setkomavar{title}{Salut} 
\setkomavar{toname}{To Name TO}
\setkomavar{toaddress}{Custom Avenue}
%\setkomavar{yourmail}{yourmail}
%\setkomavar{yourmail}{yourmail}
%\setkomavar{yourref}{65001/rys}

%--Fonts--------
\usepackage{mathptmx}
\usepackage[scaled=0.9]{helvet}

\renewcommand{\rmdefault}{helvet}

\setkomafont{addressee}{\sffamily}
\setkomafont{backaddress}{\sffamily}
\setkomafont{fromaddress}{\sffamily\mdseries}
\setkomafont{fromname}{\sffamily}
\setkomafont{subject}{\sffamily}

\renewcommand{\raggedsignature}{\raggedright} % make the signature ragged right



\begin{document}

\begin{letter}{Steinauer Immobilien + Verwaltungs AG\\Kasernenstrasse 1\\Postfach\\8180 Bülach}
  \opening{Sehr geehrte Damen und Herren,}
  
  Hiermit bestätige ich, dass ich für die Wohnungsbezahlungen meines Sohnes selbst verantwortlich bin.
  
  \closing{Mit freundlichen Grüssen}
  
  \hfill
  
  
  \encl{Anmeldungsformular\\
  Betreibungsauskünfte\\
  Passkopien}
\end{letter}
  
\end{document}