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Claude lawyer used Claude and filed a hallucinated citation in federal court

Filing about what happened: https://www.documentcloud.org/do...
hairraiser apoplectic haunted graveyard
  05/16/25
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shaky out-of-control indian lodge
  05/16/25
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hairraiser apoplectic haunted graveyard
  05/16/25
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Iridescent Plaza
  05/16/25
EXPLAIN how it wasn't caught. Go on, Mr. Lawyer.
Smoky soul-stirring toaster
  05/16/25
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hairraiser apoplectic haunted graveyard
  05/16/25
"Ivana Dook-- Ivana Dookie-- Ivana not work at Latham &...
180 violet shrine
  05/16/25
...
hairraiser apoplectic haunted graveyard
  05/16/25
Based
Autistic home prole
  05/16/25
...
hairraiser apoplectic haunted graveyard
  05/16/25
How was it "an honest citation mistake and not a fabric...
ebony contagious piazza half-breed
  05/16/25
I was hallucinating, Your Honor
Arousing very tactful alpha
  05/16/25
...
hairraiser apoplectic haunted graveyard
  05/16/25


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Date: May 16th, 2025 1:12 AM
Author: hairraiser apoplectic haunted graveyard

Filing about what happened: https://www.documentcloud.org/documents/25943457-anthropic-515-filing/#document/p1

Anthropic’s lawyer was forced to apologize after Claude hallucinated a legal citation

A lawyer representing Anthropic admitted to using an erroneous citation created by the company’s Claude AI chatbot in its ongoing legal battle with music publishers, according to a filing made in a Northern California court on Thursday.

Claude hallucinated the citation with “an inaccurate title and inaccurate authors,” Anthropic says in the filing, first reported by Bloomberg. Anthropic’s lawyers explain that their “manual citation check” did not catch it, nor several other errors that were caused by Claude’s hallucinations.

Anthropic apologized for the error and called it “an honest citation mistake and not a fabrication of authority.”

Earlier this week, lawyers representing Universal Music Group and other music publishers accused Anthropic’s expert witness — one of the company’s employees, Olivia Chen — of using Claude to cite fake articles in her testimony. Federal judge, Susan van Keulen, then ordered Anthropic to respond to these allegations.

The music publishers’ lawsuit is one of several disputes between copyright owners and tech companies over the supposed misuse of their work to create generative AI tools.

This is the latest instance of lawyers using AI in court and then regretting the decision. Earlier this week, a California judge slammed a pair of law firms for submitting “bogus AI-generated research” in his court. In January, an Australian lawyer was caught using ChatGPT in the preparation of court documents and the chatbot produced faulty citations.

However, these errors aren’t stopping startups from raising enormous rounds to automate legal work. Harvey, which uses generative AI models to assist lawyers, is reportedly in talks to raise over $250 million at a $5 billion valuation.

https://techcrunch.com/2025/05/15/anthropics-lawyer-was-forced-to-apologize-after-claude-hallucinated-a-legal-citation/

(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48935923)



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Date: May 16th, 2025 1:22 AM
Author: shaky out-of-control indian lodge



(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48935939)



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Date: May 16th, 2025 12:23 PM
Author: hairraiser apoplectic haunted graveyard



(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48936891)



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Date: May 16th, 2025 2:01 PM
Author: Iridescent Plaza



(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937146)



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Date: May 16th, 2025 1:42 AM
Author: Smoky soul-stirring toaster

EXPLAIN how it wasn't caught. Go on, Mr. Lawyer.

(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48935951)



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Date: May 16th, 2025 1:07 PM
Author: hairraiser apoplectic haunted graveyard



(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937004)



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Date: May 16th, 2025 2:30 AM
Author: 180 violet shrine

"Ivana Dook-- Ivana Dookie-- Ivana not work at Latham & Watkins no more, amirite?!"

(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48935961)



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Date: May 16th, 2025 5:41 PM
Author: hairraiser apoplectic haunted graveyard



(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937732)



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Date: May 16th, 2025 1:35 PM
Author: Autistic home prole

Based

(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937066)



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Date: May 16th, 2025 5:43 PM
Author: hairraiser apoplectic haunted graveyard



(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937739)



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Date: May 16th, 2025 2:19 PM
Author: ebony contagious piazza half-breed

How was it "an honest citation mistake and not a fabrication of authority"?

Did the cited "authority" exist or not?

(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937210)



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Date: May 16th, 2025 3:26 PM
Author: Arousing very tactful alpha

I was hallucinating, Your Honor

(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937382)



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Date: May 16th, 2025 4:03 PM
Author: hairraiser apoplectic haunted graveyard



(http://www.autoadmit.com/thread.php?thread_id=5725737&forum_id=2#48937496)