Del Biaggio v. Bansen
CA California (4d) · Jul 10, 2026
What happened in this matter?
The California Court of Appeal sanctioned attorney Carlton Floyd $1,500 for filing an appellate brief containing fabricated legal quotations and misrepresented case law. The court determined the attorney failed to fulfill his fundamental duty to personally verify the accuracy of legal authorities cited in court filings, despite his admission of using generative AI tools without adequate supervision.
- Why the court cared
- The court reasoned that the attorney failed his fundamental duty to personally verify legal authorities. It found the attorney's reliance on a paralegal to verify AI-generated additions while he was in trial was insufficient. The court further noted that the attorney's delay in correcting the misstatements until shortly before oral argument unnecessarily burdened the court and opposing counsel, justifying a sanction payable to the court clerk.
- Why it matters now
- This case underscores that delegating verification of AI-generated legal research to non-lawyers or relying on unverified AI outputs constitutes a breach of an attorney's duty of candor. It highlights that even if an attorney admits to errors and eventually corrects them, the failure to personally verify primary authority remains sanctionable.
Why this matter is tracked
In Del Biaggio v. Bansen, the California Court of Appeal sanctioned attorney Carlton Floyd $1,500 for filing an appellate brief containing misrepresentations of case law, including fictitious quotations and misattributed authority. The attorney admitted to using generative AI to draft additions to the brief during trial recesses without personally verifying the outputs, relying instead on a paralegal who misunderstood the verification responsibility. The court found the attorney's supervision protocol inadequate and noted that the corrections were only submitted shortly before oral argument, months after the sanctions motion was filed. While the court vacated a separate trial-level sanctions award against the attorney, it imposed the $1,500 penalty payable to the court clerk for the burden caused by the unverified filings.
This case underscores that delegating verification of AI-generated legal research to non-lawyers or relying on unverified AI outputs constitutes a breach of an attorney's duty of candor. It highlights that even if an attorney admits to errors and eventually corrects them, the failure to personally verify primary authority remains sanctionable.
Record details
What the record establishes about AI use
The attorney admitted to using generative AI in his declaration.
Appellate review of a trial court's fee award and sanctions order, combined with a court-initiated order to show cause regarding misrepresentations in the opening brief.
Correction behavior is not separately verified in the current record.
Tracked discrepancy record
3 citation, quotation, or authority issues are recorded in the source dataset.
- Misrepresented: Case Law | Brief misidentified and misstated Guinn (cited as 'Guinn v. Dotco, Inc., 27 Cal.App.4th 262') and described it as involving a contractual fee provision when it concerned statutory authority.
- False Quotes: Case Law | Opening brief attributed a definitive statement endorsing paralegal fee recovery to Gorman that does not appear in the opinion.
- False Quotes: Case Law | Opening brief purported to quote PLCM with two specific passages endorsing paralegal fee recovery; court found no such language in PLCM and that PLCM did not address paralegal fees.
Questions this record answers
- What happened in Del Biaggio v. Bansen?
- The California Court of Appeal sanctioned attorney Carlton Floyd $1,500 for filing an appellate brief containing fabricated legal quotations and misrepresented case law. The court determined the attorney failed to fulfill his fundamental duty to personally verify the accuracy of legal authorities cited in court filings, despite his admission of using generative AI tools without adequate supervision.
- Why does Del Biaggio v. Bansen matter for legal AI risk?
- This case underscores that delegating verification of AI-generated legal research to non-lawyers or relying on unverified AI outputs constitutes a breach of an attorney's duty of candor. It highlights that even if an attorney admits to errors and eventually corrects them, the failure to personally verify primary authority remains sanctionable.
- What does the public record establish about Del Biaggio v. Bansen?
- 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 Del Biaggio v. Bansen 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.