Even in health care systems corruption is an increasing problem. Since the German Anti-Corruption-Law (1997) the areas of financial support, sponsoring and corruption in medicine are analyzed much more intensively. This article sketches the crucial points of the debate on medical funding and shows the consequences of the new jurisdiction. Most important is the balance between a transparent documentation and a too-far-reaching bureaucracy, which hinders medical research. Finally, this article presents core principles as helpful rules in practice.