This essay deals with the topic of plagiarism and is based on the question "is it possible to plagiarize someone else`s work and then get away with it?". The essay describes the context of plagiarism as well as the popular plagiarism checking tools. This is followed by a comparison and analysis of some selected tools. From the results it was found, that it in many cases is possible to "fool" some plagiarism checking tools. Finally, based on the results obtained, a draft of a tool that modifies a text in order to avoid being "caught" in a plagiarism checking tool is presented.