Taking (borrowing, stealing, buying) someone else's work, or parts thereof, and submitting it as one's own is regarded as plagiarism.
Such intentional plagiarism has been recognised as a growing problem within the academic community. Not only do examiners face assignments in which chunks of text have been deliberately inserted without appropriate references, but there is also a huge market of so-called paper mills on the Internet, where students can buy ready-made essays or order customised papers (more about that below).
In order to prevent such attempts at cheating, essay supervisors usually do not accept finished academic essays without having followed their students' projects closely and discussed the development of the essay with the writer during the whole writing process. As further discussed in the AWELU section called Academic Integrity at Lund University, many departments at LU also use the plagiarism detection system Urkund.