Scientific communication in the humanities faces a change in the format of publications and in the volume of editorial production in Brazil. There has been a considerable increase in the number of authors and a greater flow of papers published in digital format. This paper explores a central aspect of the ethics in science communication — plagiarism. Plagiarism is defined as an undue appropriation of someone else’s creation, which disregards the author’s right to be recognized and frustrates the reader’s expectations to read new material. As a rule, plagiarism is an ethical offense that violates the right to attribution in science communication. This paper analyzes two common plagiarism strategies, copy and pastiche. In cases where the text is protected by copyrights, plagiarism can also be a crime.