\documentclass[12pt,a4paper,ngerman,notitlepage]{article}

% PACKAGES
\usepackage[ngerman]{babel}
\usepackage{datetime} % Correct Date Formating
\usepackage[a4paper, left=2.5cm, right=2cm, top=2cm, bottom=2cm]{geometry}
\usepackage{graphicx}
\usepackage{latexsym} % Blankboxes
\usepackage{listings}
\usepackage{mathtools}
\usepackage[onehalfspacing]{setspace}
\usepackage{tabularx}
\usepackage{tikz}
\usepackage{titling} % mktitleformatting

% SHORTCUTS
\newcommand{\module}{Platzhalter}
\newcommand{\blattnr}{PlatzhalterNr}

% INFO
\author{Tuan-Dat Tran}
\title{\module\\\blattnr}

% FORMATTING
\setlength{\droptitle}{-3cm}
\DeclareRobustCommand{\rchi}{{\mathpalette\irchi\relax}}
\newcommand{\irchi}[2]{\raisebox{\depth}{$#1\chi$}}

% BEGINNING
\begin{document}
\maketitle
\end{document}