Lin v. Leal
California SC · Oct 23, 2025
What happened in this matter?
The court issued an Order to Show Cause regarding potential sanctions against plaintiffs' counsel for citing a non-existent case and misrepresenting another authority in their opposition to a motion for summary judgment. The court explicitly identified these citations as likely generated by AI tools and scheduled a hearing to address the violation of California Code of Civil Procedure section 128.7(b)(2).
- Why the court cared
- The court determined that the plaintiffs' opposition relied on a non-existent case and an incorrectly cited, inapplicable authority, violating the duty of candor under Code of Civil Procedure section 128.7(b)(2).
- Why it matters now
- This case illustrates the judicial response to the submission of AI-generated fake citations in California state court. It highlights the risk of summary judgment opposition being undermined by unverified research and the potential for professional sanctions under procedural rules governing attorney conduct.
Why this matter is tracked
In a civil action involving commercial lease disputes, the Superior Court of California granted the defendant's motion for summary judgment, finding that the plaintiffs failed to present sufficient evidence to raise a genuine dispute of material fact. During the proceedings, the court identified that the plaintiffs' opposition papers contained citations to a non-existent case, 'Mutual Benefit Life Ins. Co. v. Grigsby,' and a mischaracterized, incorrectly cited authority, 'Sumitomo Bank v. Iwasaki.' The court noted these citations were likely generated by AI tools. Consequently, the court issued an Order to Show Cause requiring the plaintiffs' counsel to explain why they should not be sanctioned for violating Code of Civil Procedure section 128.7(b)(2) by submitting fake or improper legal authorities.
This case illustrates the judicial response to the submission of AI-generated fake citations in California state court. It highlights the risk of summary judgment opposition being undermined by unverified research and the potential for professional sanctions under procedural rules governing attorney conduct.
Record details
What the record establishes about AI use
The court noted the citations were likely generated by AI tools.
The court granted the defendant's motion for summary judgment and simultaneously issued an Order to Show Cause regarding sanctions against plaintiffs' counsel, with a hearing scheduled for December 9, 2025.
Correction behavior is not separately verified in the current record.
Tracked discrepancy record
2 citation, quotation, or authority issues are recorded in the source dataset.
- Fabricated: Case Law | Plaintiffs cited a non-existent case 'Mutual Benefit Life Ins. Co. v. Grigsby' as supporting authority; court found the case does not exist and treated it as a fake citation.
- Misrepresented: Case Law | Plaintiffs cited an incorrect/misleading Sumitomo authority; the citation given is wrong and the cited authority does not appear to support Plaintiffs' proposition.
Questions this record answers
- What happened in Lin v. Leal?
- The court issued an Order to Show Cause regarding potential sanctions against plaintiffs' counsel for citing a non-existent case and misrepresenting another authority in their opposition to a motion for summary judgment. The court explicitly identified these citations as likely generated by AI tools and scheduled a hearing to address the violation of California Code of Civil Procedure section 128.7(b)(2).
- Why does Lin v. Leal matter for legal AI risk?
- This case illustrates the judicial response to the submission of AI-generated fake citations in California state court. It highlights the risk of summary judgment opposition being undermined by unverified research and the potential for professional sanctions under procedural rules governing attorney conduct.
- What does the public record establish about Lin v. Leal?
- The record summarizes the outcome described in the linked public source. The recorded document is hosted in the upstream publisher archive. This page is not a substitute for the complete docket, subsequent history, or jurisdiction-specific advice.
- Which source supports this Lin v. Leal summary?
- The recorded source is Damien Charlotin case archive. It is classified as publisher document archive; review the linked material and subsequent docket history before relying on this summary.
Related matters
Related by court, jurisdiction, tool, or classified failure pattern. Similarity does not imply the same facts or outcome.