\documentclass[biblatex]{deltares_memo}

\begin{document}
\memoTo{To}
\memoConfidentialUntil{Date2}
\memoDate{Date1}
\memoVersion{Version}
\memoFrom{From}
\memoTelephone{+31\,(0)88\,335\,8568}
\memoEmail{Email}
\memoSubject{Subject}
\memoCopy{---}

\deltarestitle
%------------------------------------------------------------------------------

% Text body

%------------------------------------------------------------------------------
\LastPage
\end{document}
