Please note that one organizational Turnitin/ithenticate account will have multiple users but with the same database. After that, you submit a manuscript to the journal that uses the same Turnitin/ithenticate account.
When you submit your dissertation, it will be checked using Turnitin/ithenticate automatically. It also happens with a dissertation/thesis. The journal editor and the students/faculty members submit the same document to the same Turnitin/ithenticate account. If the journal uses the same Turnitin/ithenticate account under a university where the students or faculty members are in there, then self-matching is identified. It is similar to the case of submitting a manuscript in a journal. Submitting papers as a non-enrolled student does not affiliate any link to the actual student user. If the student had already submitted that same paper to the same assignment or elsewhere, then the instructor’s submission will match the student’s paper 100% and vice-versa if the student submits their own paper after the instructor’s submission (as a non-enrolled student). Self-matching may also occur when an instructor submits a student’s paper as a non-enrolled student to an assignment. This is because papers submitted to different classes are not automatically excluded as self matches However, a self-match can occur when a student submits the same paper to assignments in different classes where at least one of the assignments is set to save papers to the repository. If a student submits the same paper to multiple assignments in the same class, those submissions will not match each other, thanks to the default self-match exclusion. I just would like to provide a brief explanation about this topic. Well, it mostly happens with the students, either for the submission of multiple assignments or for submitting a manuscript in an international journal.