Ruiz v. Magellan Financial & Insurance Services
U.S. District Court, District of Arizona · D. Ariz. · Arizona bar guidance
Conduct
Counsel filed four briefs with AI-generated fake quotations or an inaccurate AI-generated case summary; the court found a second set of errors after her first show-cause response.
Consequence
Here the court issued a formal public reprimand that counsel must report wherever past attorney discipline must be disclosed.
Lesson
Here the court's search of counsel's other briefs turned a two-quotation problem into a pattern, which it counted as an aggravating factor.
Verified September 29, 2026
- Citation
- Ruiz v. Magellan Financial & Insurance Services, No. CV-23-02090-PHX-DWL, Order (D. Ariz. Aug. 24, 2026), ECF No. 179
- Decided
- August 24, 2026
Summary
On July 8, 2026, the court ordered plaintiff's counsel Elizabeth Tate to show cause why she should not be sanctioned or disciplined for including two false quotations from Ninth Circuit cases in the plaintiff's response to the defendant's motion for attorneys' fees. After reviewing her response, the court identified three other briefs with similar errors that "may also be attributable to the misuse of generative AI" and ordered her to address them. Tate acknowledged that three briefs in the action contained fake AI-generated quotations and that a fourth contained an inaccurate AI-generated case summary. Her supplemental response, as quoted in the order, stated that she "utilized ChatGPT to prepare the draft brief" in one motion, that ChatGPT cited Ansell v. Green Acres Contracting Co. for a proposition, and that she "also utilized ChatGPT to assist with the Brief on Impeachment," in which she "mistakenly did not correct the misquotations." She argued that the errors were "inadvertent oversights," that she had "learned her lesson," and that sanctions or discipline were unnecessary, noting she also faced potential State Bar of Arizona discipline.
- AI tool:
- ChatGPT (named in counsel's response for two of the four affected filings; the court describes the errors in all four as AI-generated)
- Sanction amount:
- Formal public reprimand, which counsel must report wherever she is required to report past attorney discipline
What sanction did the court impose?
The court held that the conduct violated, at a minimum, Rule 11(b)(2) and ER 1.1 (competence), ER 1.3 (reasonable diligence) and ER 3.1 (legal arguments lacking a good faith basis in the law), and that Tate's "inadvertent oversights" argument went only to the choice of sanction. Applying the ABA Standards as the Ninth Circuit does for misrepresentations to a court, it found her mental state "if not intentional, was at least negligent and was arguably reckless," that her fake quotations created a potential for injury, and that the conduct was not isolated. It credited two mitigating factors (remorse and the absence of a dishonest motive) but weighed three aggravating factors: prior discipline, a pattern of misconduct or multiple offenses, and substantial experience. Concluding that "no sanction less severe than a reprimand would be appropriate," the court ordered that the order "constitutes a formal public reprimand" and that Tate must report this discipline in any context in which she is required to report past attorney discipline.
Why does Ruiz v. Magellan Financial & Insurance Services matter for law firms using AI?
Ruiz shows a court treating AI-hallucinated quotations as attorney discipline rather than only a Rule 11 matter. The order frames the choice of sanction through the ABA Standards that the Ninth Circuit applies to “discipline for misrepresentations to a court,” which turn “in large measure, on the lawyer’s mental state.” The court placed Tate’s conduct between negligence and recklessness, found a potential for injury because “had the Court uncritically accepted her fake quotations and inaccurate case citation, this could have led to legal errors,” and concluded that reprimand was the floor.
The procedural sequence mattered. Tate’s first response described the problem as “two citation errors” and contrasted her case with sanctions involving “widescale false citations in multiple briefs.” The court treated that assertion as, in part, the reason it asked her to address additional errors it had found in three other briefs, and she then acknowledged that three briefs contained fake AI-generated quotations and a fourth an inaccurate AI-generated case summary, naming ChatGPT for two of those filings. The court went on to find that the conduct “was not isolated.”
The court credited her honesty and contrition and agreed her conduct was “not as egregious as some of the conduct that has warranted severe sanctions in other cases,” but still found “some form of sanction is warranted.” The result is a formal public reprimand with a continuing reporting obligation. Firms documenting compliance may wish to consider that, in this court, an initial response that described only “two citation errors” was, in the court’s words, “in part, the impetus” for its request that counsel address errors in her other briefs.
Implications for your firm
Operational steps a firm reading this case may wish to consider documenting. Strategic and rule-application calls belong to your firm's attorneys.
- Review all of a matter's filings once one AI error surfaces. Here the court found three more affected briefs after counsel's first response described only two citation errors.
- Verify every quotation that an AI drafting tool supplies before filing; counsel said she confirmed the cases' propositions but did not correct the misquotations.
- Document prior discipline and experience as factors a court may weigh; here both counted as aggravating factors.
- Consider that a court may impose attorney discipline directly in the case; this order is a public reprimand counsel must report going forward.