Mattox v. Product Innovations Research, LLC
U.S. District Court, Eastern District of Oklahoma · E.D. Okla. · Oklahoma bar guidance
Verified May 14, 2026
- Citation
- Mattox v. Product Innovations Research, LLC, No. 6:24-cv-235-JAR (E.D. Okla. Oct. 22, 2025) (Robertson, Mag. J.)
- Decided
- October 22, 2025
Summary
Plaintiffs' counsel filed eleven pleadings containing fabricated and erroneous legal authorities. At a show-cause hearing, drafting attorney Harrison A. Howie admitted he used ChatGPT "to make his writing more persuasive," that the program "changed his citations," and that he did not verify them before filing. Magistrate Judge Jason A. Robertson's independent review identified twenty-eight false or misleading citations across the eleven pleadings: fourteen fabricated cases that do not exist and fourteen erroneous or misquoted authorities. The court found that all counsel of record, Howie as drafter, T. Ryan Scott and Sach D. Oliver as associated and supervising counsel, and Gary R. Buckles as local counsel, violated Rule 11(b).
- AI tool:
- ChatGPT
- Sanction amount:
- $6,000 in individual fines ($3,000 / $2,000 / $1,000) plus $23,495.90 in joint and several attorney's fees
What sanction did the court impose?
The eleven affected pleadings (Dkts. 61, 72, 78, 89, 91, 92, 93, 94, 95, 101, 102) were stricken. The court issued public reprimands and imposed individual monetary sanctions of $3,000 on Howie, $2,000 on Scott, and $1,000 on Oliver; Buckles received a public reprimand and a twelve-month bar on serving as sponsoring or local counsel for any pro hac vice attorney in the district, but no fine. The Howie Law Firm and the Oliver Law Firm were ordered, jointly and severally, to reimburse $23,495.90 in defense attorney's fees and costs in equal shares. Plaintiffs were ordered to file verified amended pleadings with a signed Certification of Verification within sixty days.
Why does Mattox v. Product Innovations Research, LLC matter for law firms using AI?
For a managing partner, Mattox illustrates that the sanctions exposure from AI-fabricated citations now reaches well into five figures even outside the major metropolitan districts, and that it does not stop with the drafter. The court fined the drafting attorney, the supervising partner, and an associated attorney, reprimanded local counsel and barred him from sponsoring pro hac vice admissions for a year, and ordered two firms to reimburse more than $23,000 in opposing-counsel fees. The order pairs those penalties with forward-looking verification and certification requirements, and articulates a three-factor framework (verification, candor, accountability) for future AI-citation matters. Firms relying on associate, contract-attorney, or local-counsel arrangements should treat AI-citation verification as a documented, supervised step, not an assumption, because every attorney of record shares the Rule 11 obligation.
Sources
Further reading
Source PDF is a Westlaw printout mirrored from the Damien Charlotin hallucination database. We are working to add the underlying court docket (PACER, CourtListener, or court website) as a second source.