Resolved after 27 minutes, affecting Turnitin Logins and Native website login and 1 more, on December 11, 2025.
We’ve fixed it! Due to an unexpected service incident, users accessing the services via the following products: Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, Crossref Similarity Check in Europe may have experienced difficulties logging in to their account. Users accessing these services via an integration may also have been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Thursday, 11 December 05:00–08:37 GMT: Thursday, 11 December 13:00–16:37 AEDT: Friday, 12 December 00:00–03:37 We regret any inconvenience this may have caused if you were impacted by today’s incident.
Affected components
Update timeline
- investigating Dec 11, 2025, 04:31 PM UTC
We’ve run into some issues. Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, Crossref Similarity Check in Europe are currently experiencing an unexpected service incident, users accessing these services via an integration may also be affected. During this time, you may find that users are unable to log in or access this service. We invite you to track the progress of this incident while we work to bring the service back to optimum health.
- resolved Dec 11, 2025, 04:58 PM UTC
We’ve fixed it! Due to an unexpected service incident, users accessing the services via the following products: Turnitin Similarity, SimCheck, Originality, Authorship, iThenticate V2, Crossref Similarity Check in Europe may have experienced difficulties logging in to their account. Users accessing these services via an integration may also have been affected. We are pleased to advise that service has been restored. The incident occurred between the following times: PST: Thursday, 11 December 05:00–08:37 GMT: Thursday, 11 December 13:00–16:37 AEDT: Friday, 12 December 00:00–03:37 We regret any inconvenience this may have caused if you were impacted by today’s incident.
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