In the global financial world, the multitude of different information sources makes it difficult for the investors to choose the right information source. The credibility of the source alone does not necessarily transform the information communicated in a credible one. We try to identify the impact that differences in the financial reporting have upon the credibility of the source. We also try to explain why many times, investors do not fully use the information in the financial statements, in the notes to the financial statements or in the auditors’ report. We consider that in designing the format of the output documents of the information financial system of the company what is most important is to adapt this format to the needs of the final users and by using international financial standards, to exclude possible misinterpretation. In order to avoid financial risk and contagion risk, on the more and more global financial markets we need to have strict standards that apply to all participants in what concerns the financial reporting rules. Still, we consider that applying of financial reporting standards remains the “Achilles heal” of the global financial market.