Leiden law student's thesis invalidated and exams barred over references he says an AI tool distorted or invented; Council of State annuls fraud sanction
A law student at Leiden University used a generative AI tool to spell-check his bachelor thesis and to check and order its reference list. Seven of the thesis's footnote references (one of them appearing twice, out of 36 footnotes with references) were wrong in the final version; according to his explanation, the tool had distorted some of them, for example with wrong years or author initials, and invented others. On 29 January 2026 the faculty's exam board declared the thesis invalid and excluded him until 28 January 2027 from the thesis track and every exam in the faculty's programmes, reasoning that the fictitious references indicated unauthorised use of generative AI and therefore fraud. The university's appeals board for examinations found in March 2026 that he had plausibly shown he used generative AI to prepare his reference list, which it called a permitted use, but held him responsible for the non-existent sources; the exam board then re-imposed the invalidation with an exclusion until 29 July 2026, and the appeals board upheld that in July. On 14 October 2026 the Administrative Jurisdiction Division of the Council of State (Raad van State) found his explanation plausible, held that no more than carelessness had been shown, and annulled the sanction; the thesis must now be graded, and the examiner may take the incorrect references into account in the grade.
AI involvement supported · Causal attribution supported · 2 sources, 1 underlying account · Added 17/10/2026