Turnitin processes over 300 million papers annually. It's the most widely used plagiarism and AI detection tool in US higher education, and your professor likely submits every single paper through it. Here are five warning signs that your essay is going to get flagged — and what to do about each one.
1. You Used AI to Write Part (or All) of Your Paper
Since April 2023, Turnitin has included AI Writing Detection as a built-in feature. It doesn't just check for plagiarism anymore — it actively scans for AI-generated content from ChatGPT, GPT-4, Claude, Gemini, and every other major language model.
Turnitin's AI detection works at the sentence level. It can identify which specific sentences were likely AI-generated, even if the rest of the paper is human-written. The detection percentage appears alongside the traditional similarity score, and professors see both.
What to do about it
The only reliable solution is to ensure your paper is written entirely by a human — either yourself or a professional writer. No paraphrasing tool or "humanizer" consistently beats Turnitin's AI detection.
Every Scholar Works paper comes with a free Turnitin report — 100% human, guaranteed.
Order a Human-Written Paper →2. Your Similarity Score Is Above 15%
Turnitin's similarity score measures how much of your text matches existing sources in its database of 1.6 billion web pages, 99,000+ journals, and hundreds of millions of student papers.
A score under 10% is generally safe — this usually represents properly cited quotes and common academic phrases. Between 10-15% is a yellow zone. Above 15% will likely trigger a manual review from your professor.
Common causes of high similarity
- Uncited direct quotes: Forgetting quotation marks around borrowed language
- Over-reliance on a single source: Paraphrasing too closely from one article
- Common phrases: Discipline-specific terminology that appears in many papers
- Recycled content: Resubmitting your own previous work (yes, this counts)
- Bibliography/reference page: These often match exactly, which is normal
What to do about it
Paraphrase thoroughly — don't just swap synonyms. Ensure every direct quote is in quotation marks with proper citation. Use multiple sources rather than heavily relying on one. And never resubmit your own previous papers without professor approval.
3. Your Paper Has Metadata That Doesn't Match
This is one most students don't know about. Turnitin can detect metadata inconsistencies in uploaded documents. If your Word document shows it was created by "ChatGPT" or "OpenAI" in the file properties, or if the creation date is suspicious, this can raise flags.
Similarly, if you copy-paste from a website or AI tool, hidden formatting and metadata can travel with the text. Some professors have learned to check these properties manually.
What to do about it
If you're writing in Word, check File → Properties and ensure the author field shows your name. Create a fresh document rather than editing a template from an unknown source. And strip formatting from any pasted text using "Paste as plain text" (Ctrl+Shift+V).
4. Your Writing Style Is Inconsistent
Professors notice when the quality and style of writing shifts dramatically within a paper. If your introduction reads like a graduate student wrote it but your analysis section sounds like a different person entirely, this triggers suspicion — even before Turnitin gets involved.
This typically happens when students paste in AI-generated sections alongside their own writing, or when they combine text from multiple sources without adequately paraphrasing.
What to do about it
Write from an outline rather than assembling pieces. If you struggle with certain sections, seek tutoring or professional writing assistance for the entire paper — not just the parts you find difficult. Consistency matters.
5. Your Sources Don't Exist or Are Incorrect
This is the telltale sign of AI involvement that even Turnitin can't always catch — but your professor will. AI language models frequently "hallucinate" academic sources: they generate plausible-looking citations for papers, authors, and journals that don't actually exist.
When your professor clicks on a DOI that leads nowhere, or searches for a journal article that doesn't exist, your credibility is destroyed instantly. Many professors have started spot-checking citations as a routine part of grading.
What to do about it
Verify every single source. Click every DOI. Search for every article in your university's database. If a source doesn't exist in Google Scholar, it probably doesn't exist at all. Never submit a bibliography you haven't personally verified.
How to Submit With Total Confidence
The students who never worry about Turnitin are the ones who submit genuinely original, human-written work with properly cited, verified sources. That's it — there's no secret trick or hack.
If you're unable to write the paper yourself — whether due to time pressure, language barriers, difficulty with the material, or any other reason — Scholar Works provides a legitimate alternative. Every paper is written from scratch by a verified expert in your field, with real academic sources that actually exist.
We include a free Turnitin originality report and GPTZero AI detection scan with every order. You review the reports before submitting. If anything isn't perfect, we revise for free — unlimited times.
Submit With Confidence — Every Time
100% human-written. Verified sources. Free Turnitin + GPTZero reports included.
Order Now — 15% Off Your First Paper →Final Thought
Turnitin is designed to catch shortcuts. The only way to consistently pass is to avoid shortcuts entirely. Whether you write it yourself or work with a professional human writer, the paper needs to be genuinely original, properly sourced, and authentically human.
At Scholar Works, that's exactly what we deliver — every time, for over 200,000 students. If your deadline is approaching and you need help you can trust, we're available 24/7.