What was hallucinated

Misrepresented: Case Law | AI-attributed the doctrine of a 'structural conflict of interest' to Strother; court found Strother does not contain that proposition and rejected the citation. || Misrepresented: Case Law | AI claimed Comfort Capital established that release language in receivership orders is subject to substantive review; court found Comfort Capital did not address releases and rejected the attribution. || Misrepresented: Other | The factum contained three cases wrongly cited for propositions not contained in those decisions (general miscitations identified by the court).

Sanction teardown · Ontario SCJ, Canada · 2026-06-02

Marper Holdings Limited v. Foxpark Development Corporation

What happened

In Ontario SCJ, Canada, a filing relied on an unnamed/unconfirmed AI tool to help draft legal argument. The court identified the following problems with the citations in that filing:

Misrepresented (Case Law)

AI-attributed the doctrine of a 'structural conflict of interest' to Strother; court found Strother does not contain that proposition and rejected the citation.
Misrepresented (Case Law)

AI claimed Comfort Capital established that release language in receivership orders is subject to substantive review; court found Comfort Capital did not address releases and rejected the attribution.
Misrepresented (Other)

The factum contained three cases wrongly cited for propositions not contained in those decisions (general miscitations identified by the court).

Which AI tool

an unnamed/unconfirmed AI tool. Note: Charlotin's public database records tool attribution only where a court order, brief, or reporting on the matter states it explicitly; "unidentified" or "implied" means the record indicates AI use but does not name a specific product — we do not guess.

Outcome

Not specified in source record.

How Citation Safe would have caught this

Citation Safe runs three deterministic layers before a brief is filed: (1) does the citation exist against CourtListener's database of published opinions, (2) if quoted, does that exact language appear in the source, (3) does the cited case actually support the proposition it is cited for. Fabricated case citations fail Layer 1. Fabricated or misattributed quotations fail Layer 2 even when the underlying case is real. Misrepresented holdings — a real case cited for a proposition it does not support — are the target of Layer 3. None of these checks involve asking another language model whether the citation looks right; they are lookups and text-matches against the actual source, which is why a hallucinated citation has to survive a direct lookup against the authoritative source — not another model's opinion — to earn a VERIFIED stamp; our measured false-verify rate is published live at /quality.

Check a brief before you file it → · See our live false-verify rate

Source: https://www.damiencharlotin.com/documents/2540/Marper-Holdings-Limited-v.-Foxpark-Development-Corporation-2026-ONSC-3254.pdf, via Damien Charlotin's public AI Hallucination Cases Database (CC0).

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