No-Repository (also called non-repository) is a Turnitin submission setting. Your paper is analysed against existing sources, but it is not stored as a new source. That is essential for private pre-submission checks.
Repository ON vs OFF
- Repository ON — common on graded university submissions; paper can be stored.
- Repository OFF — analysis only; ideal for drafts and unlimited re-checks.
- Student-mode free tools often store files without clear disclosure.
Why this matters in Sri Lanka
Postgraduate programmes involve many chapter revisions. One early upload to a repository-on tool can make a later official submission look like 100% self-plagiarism. Students at Colombo, Kelaniya, SLIIT and elsewhere hit this every semester.
How Similarfy enforces No-Repository
- We route documents through verified Turnitin instructor accounts.
- Accounts are configured for No-Repository / non-indexed workflow.
- Official Similarity and AI PDFs are exported for you.
- Session cleanup + our 24-hour auto-delete policy protect your files.
Pair this with our AI detection guide so you review both originality and AI signals before faculty submission.
When you should still use the university portal
Final graded submissions must follow your faculty rules. Similarfy is the private rehearsal — not a replacement for official LMS Turnitin where required.
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Official Similarity + AI reports in No-Repository mode. Built for students and researchers in Sri Lanka.