IP Wealth cited fabricated AI-generated case law before the Australian Trade Marks Office
In Leytcorp Pty Ltd v Mimbim Enterprises Pty Ltd [2025] ATMO 264, IP Wealth submitted materials referencing non-existent cases and propositions of law attributed to AI hallucinations. Delegate Benjamin Goldsworthy identified the fabricated authorities and described the conduct as unfortunate but declined to impose sanctions beyond standard costs. The decision was issued on 22 December 2025 by the Australian Trade Marks Office.
AI fabricated non-existent case law and propositions of law that a trade mark representative filed as real precedent before an Australian tribunal.
Key facts
- What
- In Leytcorp Pty Ltd v Mimbim Enterprises Pty Ltd [2025] ATMO 264, IP Wealth submitted materials referencing non-existent cases and propositions of law attributed to AI hallucinations.
- Incident date
- Dec 22, 2025
- Who
- IP Wealth
- Failure mode
- Hallucination
- AI surface
- Copilot
- Severity
- Medium
What happened
In proceedings before the Australian Trade Marks Office, IP Wealth acting for Leytcorp submitted materials citing several non-existent cases and proffering non-existent propositions of law. Delegate Benjamin Goldsworthy identified these as AI hallucinations, noting the fabricated references originated from the representative and not the client. The Delegate cited Murray v State of Victoria [2025] FCA 731 for the principle that responsibility lies with the legal representative. No additional sanctions were imposed beyond standard costs, though the conduct was described as unfortunate and noted to have perpetuated confusion in the proceedings.
What broke inside the model
- 01 · TriggerA user asks for a fact, a citation, or a figure.
- 02 · Model stepThe model writes a fluent, confident answer.
- 03 · Control gapNothing ties the claim back to a real source.
- 04 · FailureA fabricated fact ships as if it were verified.
- 05 · ConsequenceThe false claim reaches a customer, a court, or the public.
Confidence holds, and even spikes, as the claim detaches from any source.
A generative AI model produced plausible-sounding but entirely fictitious legal case citations and propositions of law, which the legal representative filed without verification. The model hallucinated authoritative-sounding precedents that had no existence in any legal database. The absence of a verification step in the representative's workflow allowed the fabricated authorities to reach the tribunal.
What it cost
Sources
- Court FilingLeytcorp Pty Ltd v Mimbim Enterprises Pty Ltd [2025] ATMO 264 (22 December 2025)websitedc.s3.amazonaws.com
- PrimaryAI Hallucination Cases Database: Leytcorp v Mimbim Enterprisesdamiencharlotin.com
Cite this entry
https://failureindex.ai/failures/ip-wealth-cited-fabricated-ai-generatedAI Failure Index. "IP Wealth cited fabricated AI-generated case law before the Australian Trade Marks Office" (FI-0132). Realm Labs. https://failureindex.ai/failures/ip-wealth-cited-fabricated-ai-generated (indexed Jun 4, 2026).Data fields CC-BY 4.0, prose citation permitted. Incident ID FI-0132. Full dataset at /data.
Note from Realm Labs, the Index steward
How Realm would have caught this
- Prism
- OmniGuard
- AI Detection & Response (AIDR)
A runtime layer that watches the model's internal state can flag the moment a model commits to a claim it has no support for, and hold or reroute the response before it reaches a user. Realm reads those signals in real time rather than grading the transcript after the fact.