Mattox v. Product Innovations Research, LLC
U.S. District Court, Eastern District of Oklahoma · E.D. Okla. · Oklahoma bar guidance
Verified September 29, 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. Howle 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, Howle 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 and costs
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 Howle, $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 Howle 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 shows sanctions for AI-fabricated citations reaching well into five figures and extending beyond the drafter. The court fined the drafting attorney, the supervising partner, and an associated attorney, reprimanded local counsel and barred local counsel 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 sets out a three-factor framework (verification, candor, accountability) “to guide this Court in future cases in which AI-generated hallucinations appear.” It made no bar referral, finding “no intentional deception warranting referral.” For firms using referral or local-counsel arrangements, the order treats verification as a duty of every attorney of record: “Responsibility under Rule 11 extends to all attorneys of record.”