# Similarity Check **URL:** https://community.crossref.org/c/crossref-services/similarity-check/22.md [Latest](https://community.crossref.org/latest.md) · [Categories](https://community.crossref.org/categories.md) · [Tags](https://community.crossref.org/tags.md) --- ## [About the Similarity Check category](https://community.crossref.org/t/about-the-similarity-check-category/1292)
**Author:** [@Vanessa](https://community.crossref.org/u/Vanessa)\ **Replies:** 0
Our Similarity Check service helps Crossref members prevent scholarly and professional plagiarism by providing immediate feedback regarding a manuscript’s similarity to other published academic and general web content, t… --- ## [Ticket of the month - September 2026 - Adios iThenticate v1! (Also known as: If you're not using iThenticate 2.0 yet, now's the time!)](https://community.crossref.org/t/ticket-of-the-month-september-2026-adios-ithenticate-v1-also-known-as-if-youre-not-using-ithenticate-2-0-yet-nows-the-time/16496)
**Author:** [@kluschek](https://community.crossref.org/u/kluschek)\ **Replies:** 0\ **Last updated:** [2 October 2026 17:59 UTC](https://community.crossref.org/t/ticket-of-the-month-september-2026-adios-ithenticate-v1-also-known-as-if-youre-not-using-ithenticate-2-0-yet-nows-the-time/16496 "2026-10-02T17:59:54Z")
Our Similarity Check service is powered by the iThenticate tool from Turnitin. In September of 2021, we announced that a new version of iThenticate was available - iThenticate 2.0. Some members upgraded early and have … --- ## [Update on iThenticate AI add-on?](https://community.crossref.org/t/update-on-ithenticate-ai-add-on/14776)
**Author:** [@RFragola](https://community.crossref.org/u/RFragola)\ **Replies:** 2\ **Last updated:** [14 November 2025 15:47 UTC](https://community.crossref.org/t/update-on-ithenticate-ai-add-on/14776 "2025-11-14T15:47:04Z")
Hi! I see in the iThenticate Upgrade FAQs that Crossref is not currently offering the iThenticate AI add-on to Crossref members as part of the Similarity Check service. Do you have any estimate of when the add-on may be… --- ## [Ticket of the month - May 2025 - How do I add Galley file for similarity check URL to an article yet to be published in OJS?](https://community.crossref.org/t/ticket-of-the-month-may-2025-how-do-i-add-galley-file-for-similarity-check-url-to-an-article-yet-to-be-published-in-ojs/13926)
**Author:** [@eatoni](https://community.crossref.org/u/eatoni)\ **Replies:** 0\ **Last updated:** [7 June 2025 10:08 UTC](https://community.crossref.org/t/ticket-of-the-month-may-2025-how-do-i-add-galley-file-for-similarity-check-url-to-an-article-yet-to-be-published-in-ojs/13926 "2025-06-07T10:08:25Z")
NOTE: This is a supplement to a previous ticket of the month that my colleague Kathleen had posted on Similarity check URLs here. OJS versions 3.1.2 onwards offer iThenticate plagiarism checks via the Crossref Similar… --- ## [Consulta sobre detección de artículos generados por Inteligencia Artificial en iThenticate](https://community.crossref.org/t/consulta-sobre-deteccion-de-articulos-generados-por-inteligencia-artificial-en-ithenticate/13426)
**Author:** [@udes](https://community.crossref.org/u/udes)\ **Replies:** 1\ **Last updated:** [18 March 2025 16:33 UTC](https://community.crossref.org/t/consulta-sobre-deteccion-de-articulos-generados-por-inteligencia-artificial-en-ithenticate/13426 "2025-03-18T16:33:39Z")
Consulta sobre detección de artículos generados por Inteligencia Artificial en iThenticate Estimado equipo de iThenticate, Espero se encuentren bien. Me gustaría saber si su plataforma cuenta con un plugin o herramient… --- ## [Upgrade from iThenticate v1 to iThenticate v2](https://community.crossref.org/t/upgrade-from-ithenticate-v1-to-ithenticate-v2/4773)
**Author:** [@cyan](https://community.crossref.org/u/cyan)\ **Replies:** 7\ **Last updated:** [6 January 2025 18:19 UTC](https://community.crossref.org/t/upgrade-from-ithenticate-v1-to-ithenticate-v2/4773 "2025-01-06T18:19:02Z")
I just found a post that iThenticate v2 users have access to AI writing detection tool. I’m now a v1 user, so how to upgrade to a v2 user? BTW, is the AI writing detection tool free to iThenticate users? --- ## [iThenticate v2 - the doc-to-doc PDF report issue has been fixed](https://community.crossref.org/t/ithenticate-v2-the-doc-to-doc-pdf-report-issue-has-been-fixed/4992)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 1\ **Last updated:** [15 March 2024 06:37 UTC](https://community.crossref.org/t/ithenticate-v2-the-doc-to-doc-pdf-report-issue-has-been-fixed/4992 "2024-03-15T06:37:31Z")
Similarity Check users may have noticed when they had previously tried to download a doc-to-doc PDF report in iThenticate v2 that the matches were not highlighted. I am very pleased to report that Turnitin, who produce i… --- ## [iThenticate v2 - a fix to be released for the aggregation of URLs issue in the similarity report](https://community.crossref.org/t/ithenticate-v2-a-fix-to-be-released-for-the-aggregation-of-urls-issue-in-the-similarity-report/5055)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 0\ **Last updated:** [7 March 2024 13:02 UTC](https://community.crossref.org/t/ithenticate-v2-a-fix-to-be-released-for-the-aggregation-of-urls-issue-in-the-similarity-report/5055 "2024-03-07T13:02:20Z")
Many of you have reported that different sources were being merged under one source in the iThenticate v2 similarity report making manuscripts difficult to assess quickly and accurately. I am very pleased to announce th… --- ## [Article refused by editor due a to a preprint being available on the Institutionnel Repository](https://community.crossref.org/t/article-refused-by-editor-due-a-to-a-preprint-being-available-on-the-institutionnel-repository/4519)
**Author:** [@BernardDetrembleur](https://community.crossref.org/u/BernardDetrembleur)\ **Replies:** 3\ **Last updated:** [20 December 2023 07:41 UTC](https://community.crossref.org/t/article-refused-by-editor-due-a-to-a-preprint-being-available-on-the-institutionnel-repository/4519 "2023-12-20T07:41:31Z")
Helle Crossref Community, I am managing the Institutional repository of my university (University to Namur and the institutional repository). One of our authors is facing a refusal fro an editor because of a control pe… --- ## [Ticket of the month - November 2023 - Similarity Check URLs? Tell me more!](https://community.crossref.org/t/ticket-of-the-month-november-2023-similarity-check-urls-tell-me-more/4454)
**Author:** [@kluschek](https://community.crossref.org/u/kluschek)\ **Replies:** 0\ **Last updated:** [4 December 2023 16:10 UTC](https://community.crossref.org/t/ticket-of-the-month-november-2023-similarity-check-urls-tell-me-more/4454 "2023-12-04T16:10:09Z")
Here’s the situation: You’re a Crossref member interested in applying for the Similarity Check service. You look at our documentation about how to become eligible and are immediately stumped by the first sentence: When … --- ## [Image integrity: Help us figure out the scale of the problem - Crossref](https://community.crossref.org/t/image-integrity-help-us-figure-out-the-scale-of-the-problem-crossref/2475)
**Author:** [@Crossref](https://community.crossref.org/u/Crossref)\ **Replies:** 2\ **Last updated:** [21 November 2023 13:47 UTC](https://community.crossref.org/t/image-integrity-help-us-figure-out-the-scale-of-the-problem-crossref/2475 "2023-11-21T13:47:11Z")
The Similarity Check Advisory Group met a number of times last year to discuss current and emerging originality issues with text-based content. During those meetings, the topic of image integrity was highlighted as an ar… --- ## [Checking your eligibility and applying](https://community.crossref.org/t/checking-your-eligibility-and-applying/4300)
**Author:** [@ssgu](https://community.crossref.org/u/ssgu)\ **Replies:** 1\ **Last updated:** [9 November 2023 17:30 UTC](https://community.crossref.org/t/checking-your-eligibility-and-applying/4300 "2023-11-09T17:30:38Z")
Hi all, We have deposite our articles published in our journals in Crossref and assigned a doi to each one, but when we check our eligibility to subscribe to the similarity checking service, it appears that our content … --- ## [New version of iThenticate - update for peer review management system users](https://community.crossref.org/t/new-version-of-ithenticate-update-for-peer-review-management-system-users/2211)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 7\ **Last updated:** [6 November 2023 10:29 UTC](https://community.crossref.org/t/new-version-of-ithenticate-update-for-peer-review-management-system-users/2211 "2023-11-06T10:29:06Z")
A new version of iThenticate was launched in September and we have been working with our partners at Turnitin and service providers of peer review management systems to ensure a smooth transition. EJournalPress is the f… --- ## [Similarity check update: A new similarity report and AI writing detection tool soon to be available to iThenticate v2 users - Crossref](https://community.crossref.org/t/similarity-check-update-a-new-similarity-report-and-ai-writing-detection-tool-soon-to-be-available-to-ithenticate-v2-users-crossref/4271)
**Author:** [@Crossref](https://community.crossref.org/u/Crossref)\ **Replies:** 0\ **Last updated:** [1 November 2023 14:37 UTC](https://community.crossref.org/t/similarity-check-update-a-new-similarity-report-and-ai-writing-detection-tool-soon-to-be-available-to-ithenticate-v2-users-crossref/4271 "2023-11-01T14:37:13Z")
Similarity check update: A new similarity report and AI writing detection tool soon to be available to iThenticate v2 users This is a companion discussion topic for the original entry at https://www.crossref.org/blog/n… --- ## [Similarity check update: A new similarity report and AI writing detection tool soon to be available to iThenticate v2 users - Crossref](https://community.crossref.org/t/similarity-check-update-a-new-similarity-report-and-ai-writing-detection-tool-soon-to-be-available-to-ithenticate-v2-users-crossref/4270)
**Author:** [@Crossref](https://community.crossref.org/u/Crossref)\ **Replies:** 0\ **Last updated:** [1 November 2023 12:58 UTC](https://community.crossref.org/t/similarity-check-update-a-new-similarity-report-and-ai-writing-detection-tool-soon-to-be-available-to-ithenticate-v2-users-crossref/4270 "2023-11-01T12:58:08Z")
Similarity check update: A new similarity report and AI writing detection tool soon to be available to iThenticate v2 users This is a companion discussion topic for the original entry at https://www.crossref.org/blog/s… --- ## [Similarity Check: look out for a refreshed interface and improvements for iThenticate v2 account administrators - Crossref](https://community.crossref.org/t/similarity-check-look-out-for-a-refreshed-interface-and-improvements-for-ithenticate-v2-account-administrators-crossref/3549)
**Author:** [@Crossref](https://community.crossref.org/u/Crossref)\ **Replies:** 0\ **Last updated:** [2 May 2023 15:11 UTC](https://community.crossref.org/t/similarity-check-look-out-for-a-refreshed-interface-and-improvements-for-ithenticate-v2-account-administrators-crossref/3549 "2023-05-02T15:11:20Z")
In 2022, we flagged up some changes to Similarity Check, which were taking place in v2 of Turnitin’s iThenticate tool used by members participating in the service. We noted that further enhancements were planned, and wan… --- ## [How to safelist an IP address?](https://community.crossref.org/t/how-to-safelist-an-ip-address/1386)
**Author:** [@azharlubis](https://community.crossref.org/u/azharlubis)\ **Replies:** 1\ **Last updated:** [25 August 2020 16:01 UTC](https://community.crossref.org/t/how-to-safelist-an-ip-address/1386 "2020-08-25T16:01:48Z")
My name is Azhar, a coordinator for two publishers in the Crossref DOI database. As one of the requirements in proposing the iThenticate similarity check, our journal website should be able to be indexed in the Turnitin … --- ## [Ticket of the month - December 2022 - Updating Similarity Check URLs with a .csv file](https://community.crossref.org/t/ticket-of-the-month-december-2022-updating-similarity-check-urls-with-a-csv-file/3233)
**Author:** [@kluschek](https://community.crossref.org/u/kluschek)\ **Replies:** 0\ **Last updated:** [7 January 2023 01:42 UTC](https://community.crossref.org/t/ticket-of-the-month-december-2022-updating-similarity-check-urls-with-a-csv-file/3233 "2023-01-07T01:42:30Z")
Hello all, Are you a Similarity Check subscriber and need to update your full-text Similarity Check URLs, but aren’t sure how to go about it? Are you interested in subscribing to Similarity Check, but don’t fully unders… --- ## [Similarity Check service - register full-text urls for Similarity Check pointing](https://community.crossref.org/t/similarity-check-service-register-full-text-urls-for-similarity-check-pointing/2840)
**Author:** [@lazar](https://community.crossref.org/u/lazar)\ **Replies:** 2\ **Last updated:** [27 July 2022 13:07 UTC](https://community.crossref.org/t/similarity-check-service-register-full-text-urls-for-similarity-check-pointing/2840 "2022-07-27T13:07:05Z")
We all know that to be eligible to use the Similarity Check service we need to register full-text URLs for Similarity Check pointing to the full-text article for more than 90% of our content. What is the fastest way to u… --- ## [Similarity Check: what’s new with iThenticate v2? - Crossref](https://community.crossref.org/t/similarity-check-what-s-new-with-ithenticate-v2-crossref/2677)
**Author:** [@Crossref](https://community.crossref.org/u/Crossref)\ **Replies:** 0\ **Last updated:** [10 May 2022 14:55 UTC](https://community.crossref.org/t/similarity-check-what-s-new-with-ithenticate-v2-crossref/2677 "2022-05-10T14:55:43Z")
Since we announced last September the launch of a new version of iThenticate, a number of you have upgraded and become familiar with iThenticate v2 and its new and improved features which include: This is a companion d… --- ## [Issues with the abstract exclusion filter in Similarity reports](https://community.crossref.org/t/issues-with-the-abstract-exclusion-filter-in-similarity-reports/2461)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 1\ **Last updated:** [4 February 2022 09:55 UTC](https://community.crossref.org/t/issues-with-the-abstract-exclusion-filter-in-similarity-reports/2461 "2022-02-04T09:55:39Z")
Users of iThenticate v1 are currently unable to exclude abstracts from Similarity reports. When the abstract exclusion filter is applied in the viewer in the Similarity report, the abstract is not excluded from the repor… --- ## [Crossref Similarity Check service - call for user tester volunteers](https://community.crossref.org/t/crossref-similarity-check-service-call-for-user-tester-volunteers/2415)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 0\ **Last updated:** [14 January 2022 13:11 UTC](https://community.crossref.org/t/crossref-similarity-check-service-call-for-user-tester-volunteers/2415 "2022-01-14T13:11:38Z")
The Similarity Check service gives Crossref members access at a reduced rate to a content comparison tool produced by Turnitin, using the iThenticate technology, to verify the originality of scholarly works. Last Septem… --- ## [Turnitin maintenance window Jan 8 00:00 – 08:00 UTC](https://community.crossref.org/t/turnitin-maintenance-window-jan-8-00-00-08-00-utc/2391)
**Author:** [@bryanvickery](https://community.crossref.org/u/bryanvickery)\ **Replies:** 0\ **Last updated:** [4 January 2022 14:42 UTC](https://community.crossref.org/t/turnitin-maintenance-window-jan-8-00-00-08-00-utc/2391 "2022-01-04T14:42:27Z")
Turnitin will take an 8 hour maintenance window on January 8th 00:00 – 08:00 UTC \[go to Event Time Announcer - Turnitin Scheduled Maintenance January 7th, 2022 for local time\]. While Turnitin’s systems are not expected t… --- ## [Similarity Check news: iThenticate v2.0 ready for launch - Crossref](https://community.crossref.org/t/similarity-check-news-ithenticate-v2-0-ready-for-launch-crossref/2097)
**Author:** [@Crossref](https://community.crossref.org/u/Crossref)\ **Replies:** 0\ **Last updated:** [20 September 2021 15:46 UTC](https://community.crossref.org/t/similarity-check-news-ithenticate-v2-0-ready-for-launch-crossref/2097 "2021-09-20T15:46:00Z")
Crossref Similarity Check news: iThenticate v2.0 ready for launch Last year, we announced the upcoming launch of a new version of iThenticate, the product from Turnitin that powers Crossref Similarity Check. We know some… --- ## [Changes to the Similarity Check service - some subscribers need to safelist an additional IP address by 31st October 2021](https://community.crossref.org/t/changes-to-the-similarity-check-service-some-subscribers-need-to-safelist-an-additional-ip-address-by-31st-october-2021/2052)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 4\ **Last updated:** [22 September 2021 08:39 UTC](https://community.crossref.org/t/changes-to-the-similarity-check-service-some-subscribers-need-to-safelist-an-additional-ip-address-by-31st-october-2021/2052 "2021-09-22T08:39:18Z")
The Similarity Check service gives Crossref members reduced rate access to the iThenticate service from Turnitin. You receive this reduced rate access as you contribute to the iThenticate database of published content by… --- ## [Issues with the source highlights in Similarity Reports](https://community.crossref.org/t/issues-with-the-source-highlights-in-similarity-reports/1837)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 0\ **Last updated:** [25 June 2021 09:57 UTC](https://community.crossref.org/t/issues-with-the-source-highlights-in-similarity-reports/1837 "2021-06-25T09:57:40Z")
Users of iThenticate may experience intermittent issues after modifying exclusion settings in the Filters and Settings panel of Similarity Report, upon applying the changes an error sometimes occurs that removes the sour… --- ## [Issues with submissions containing non-English characters](https://community.crossref.org/t/issues-with-submissions-containing-non-english-characters/1715)
**Author:** [@fabiennemichaud](https://community.crossref.org/u/fabiennemichaud)\ **Replies:** 4\ **Last updated:** [21 May 2021 15:07 UTC](https://community.crossref.org/t/issues-with-submissions-containing-non-english-characters/1715 "2021-05-21T15:07:10Z")
Users of iThenticate may experience issues with their reports not generating and showing as pending. This appears to be affecting submissions, which match to a submission in our database, that contains non-English chara… --- ## [Incident: Incorrect Similarity Score displaying in the document viewer for some subscribers](https://community.crossref.org/t/incident-incorrect-similarity-score-displaying-in-the-document-viewer-for-some-subscribers/1695)
**Author:** [@bryanvickery](https://community.crossref.org/u/bryanvickery)\ **Replies:** 0\ **Last updated:** [30 April 2021 11:41 UTC](https://community.crossref.org/t/incident-incorrect-similarity-score-displaying-in-the-document-viewer-for-some-subscribers/1695 "2021-04-30T11:41:30Z")
Similarity Check users are reporting a different Similarity Score displaying in the document viewer, vs the PDF or through the API integration. If the file being checked is in a folder which has exclusions applied, the … --- ## [Use similarity checker](https://community.crossref.org/t/use-similarity-checker/1183)
**Author:** [@Ankush](https://community.crossref.org/u/Ankush)\ **Replies:** 1\ **Last updated:** [17 January 2020 21:51 UTC](https://community.crossref.org/t/use-similarity-checker/1183 "2020-01-17T21:51:31Z")
Hi , We are became a member of crossref and we wanted to use similarity checker so we received the Email (below) indicating that there is a problem with URLs My question is how can we solve the problem with considerati… --- ## [Similarity Check: Doc-to-doc comparison](https://community.crossref.org/t/similarity-check-doc-to-doc-comparison/1114)
**Author:** [@BrunaErlandsson](https://community.crossref.org/u/BrunaErlandsson)\ **Replies:** 5\ **Last updated:** [27 September 2019 17:59 UTC](https://community.crossref.org/t/similarity-check-doc-to-doc-comparison/1114 "2019-09-27T17:59:47Z")
Hello all! I understand how to use the doc-to-doc comparison feature. However, I would like to understand in each cases this is actually useful… If I upload a manuscript after its submission and then I return it to the… [Next page](https://community.crossref.org/c/crossref-services/similarity-check/22.md?page=1)