Direct answer
Turnitin assigns several different identification numbers — the class ID and enrollment key you use to join a course, the paper ID attached to every submission, and the user ID behind your profile — so a "Turnitin ID number lookup" means different things depending on which number you actually need [1]. The fastest way to find each one is to check the exact surface where Turnitin stores it: the class homepage for your class ID and enrollment key, and the Digital Receipt or Similarity Report for your paper ID [1]. This guide walks you through each lookup, step by step, and explains which identifier you should be looking for in the first place.
Where Can I Find My Turnitin ID Number in My Account?
The number you need depends on what you are trying to do. To join a class, you need the class ID and enrollment key, which your instructor provides on the course page or in the assignment instructions — these are published by the instructor rather than stored anywhere inside your own account [2]. To find the ID of a paper you have already submitted, open the assignment inbox and click your paper's title, then check the report header or the Digital Receipt you received at submission time, where Turnitin records the unique paper ID for that file [2].
Your account does not display a single universal "Turnitin ID," so a successful lookup means checking the right surface. The class homepage is the only place the class ID appears, and it is almost always paired with the enrollment key your instructor set when the assignment folder was created [1]. Every Similarity Report also shows submission metadata — the author, the submission time, and the paper ID — which is the number students typically quote when they contact support or need to track a specific version of their work [2].
If you enrolled through a learning management system such as Canvas, Moodle, or Blackboard, you may never see a class ID at all, because Turnitin passes the identifier automatically in the background [1]. Even in that case, the report for your submitted paper still carries its own paper ID, so you can look it up directly from the report itself rather than from any class settings screen [2].
What Is the Difference Between a Turnitin Class ID, Enrollment Key, and Paper ID?
The class ID and enrollment key are a matched pair. The class ID tells Turnitin which assignment folder you are joining, while the enrollment key acts as the password that keeps outsiders out of that folder, and students must enter both together on their first sign-in to the class [1]. Neither number is unique to you — the class ID is shared by every student in the course, and the enrollment key is the same for all of them [1].
The paper ID is a completely different kind of number. It is generated at submission time and stays attached to that specific file, so you and your instructor can refer to the exact version you uploaded rather than to the assignment folder in general [2]. This is the identifier you quote when you ask support about a submission, and it is also the number that appears alongside your similarity score and any AI-writing flags on the report [2].
The AI writing report and the similarity report are both keyed to your paper ID, which is why looking up the correct number matters: the right ID is what lets you pull the correct report for the correct version of your file [3]. Turnitin's AI writing detection guidance explains that scores are reported per paper, so when a flag is discussed, students are asked for their paper ID rather than for a username or a class ID [3].
How Can I Check My Paper's Turnitin AI Writing Report and Similarity Score Before I Submit?
In most university setups, the AI writing report and the similarity report are only generated when your instructor enables them for the assignment, and the first time you see them is after submission [4]. That means a pre-submit lookup of your score is not available inside the institutional account — the detection runs on the file you actually hand in, and the paper ID is logged at that moment [4].
The practical alternative is to check your own draft with the same official Turnitin engine before you submit, so you can review the similarity summary and any AI-writing flags while you still have time to revise [4]. Turnitin's own guidance encourages students to discuss AI-writing results openly with instructors, and knowing your score in advance makes that conversation far more productive than discovering it for the first time in the gradebook [4].
Because every report is tied to the specific file that was checked, the paper ID and the scores only mean something for the version of the document that went through the engine [4]. Checking the exact draft you plan to submit — not an earlier revision — is what gives you a lookup you can actually trust when the official report is generated [4].
You now know exactly where every Turnitin ID number lives and which one you need for each task. The last step is making sure the report attached to your paper ID says what you expect before that ID appears in your instructor's gradebook. Turnitin0 gives you that certainty: upload the exact.docx,.pdf, or.txt draft you are about to submit, and you will receive a real Turnitin AI writing report and similarity report — the same reports professors see in their institutional systems — so there are no surprises when your paper ID is logged.
※ Turnitin0.com - Actual Turnitin AI Report Cover, Score, Flag And Similarity Summary
FAQ
What is a Turnitin ID number?
A Turnitin ID number is a unique identifier Turnitin assigns to a class (the class ID), a submission (the paper ID), or an account (the user ID). Which one you need depends on the task: joining a class, tracking a submission, or checking a report [1][2].
Where do I find my class ID?
Your instructor provides the class ID and the enrollment key on the course page or in the assignment instructions. They are not stored inside your student account, so the lookup source is always the instructor's materials [1].
Where can I find my paper ID?
Open the assignment inbox, click your paper's title, and check the report header or the Digital Receipt you received at submission time. Turnitin prints the unique paper ID in both places, and it stays attached to that exact version of your file [2].
Is the class ID the same as my paper ID?
No. The class ID identifies the assignment folder you joined and is shared by everyone in the course, while the paper ID is generated for each individual submission and belongs only to that file [1][2].
Can I check my Turnitin AI score before submitting?
In most institutional accounts, detection runs at the moment of submission, so you cannot preview the score there. You can, however, check your draft with a real Turnitin AI writing report beforehand, so the paper ID that reaches your instructor already reflects a score you know [3][4].