In Lifetime Well LLC v. IBSPOT.Com, Inc., No 25-5135 (E.D. Pa.) (January 26, 2026), the court imposed Rule 11 sanctions on two attorneys for using fake citations in a legal brief. This is a common situation. A large firm is retained to represent the defendant. None of its lawyers are admitted in the jurisdiction. The large firm hires local counsel, a local attorney who, in theory, is admitted to the bar of that local court.
The introduction: “Out-of-state website retailers sued in this federal court for trademark and intellectual property concerns may not have relationships with lawyers admitted to practice before us. The retailer company (who cannot defend itself in court without counsel) may ask their known counsel to find lawyers admitted to the Bar of our Court to act as co-counsel to defend claims against it. The members of the Bar of our Court then swear they will ensure the out-of-town counsel will fully comply with the Rules of Civil Procedure, our Local Rules, and the Judge’s Policies. We may then grant our Bar member’s motion allowing the out-of-town lawyer the privilege of specially appearing in our Court to assist the local counsel barred in this Court.
We today test the role of both sets of lawyers in the misuse of artificial intelligence in briefing. A member of the Bar of our Court moved to dismiss a trademark claim against a website retailer as co-counsel for a specially admitted New York lawyer. Our Bar member admittedly did not read or study the case law. He simply signed his name. The paper he signed along with the New York attorney contained at least eight false case citation hallucinations generated by artificial intelligence. Our talented lawyers in Chambers caught these hallucinations and we directed counsel to show cause as to why we should not impose sanctions. New York co-counsel responded by firing a new lawyer in her office who played some role in preparing the briefing who used artificial intelligence in this case and at least two others. The New York senior lawyer did not explain why she did not catch or perform the basic due diligence in reading the cases in a Memorandum prepared by an attorney under her supervision. She also did not explain why she did not use this mistake as a lesson rather than a reason to fire the new lawyer. She also placed her local co-counsel at risk of sanction without cite checking or reading the cases in the Memorandum. She asked him to sign and file. Both attorneys admit this regrettable lapse in diligence. They both issued updated policies governing their use of artificial intelligence. We find both attorneys violated the obligations owed to the Court and their colleagues forced to track down authorities. They presented false case citations and admittedly did so without checking the artificial intelligence.”
The facts were somewhat ordinary. The out-of-state lawyers hired local counsel to assist them. Local Counsel trusted them and filed a legal brief that they had sent to him. Local counsel did not cite check the brief. Had he done so, he would have noticed that the citations were to nonexistent cases.
This is the court’s discussion of the conduct of Lead Counsel: “Lead Counsel submitted a brief containing citations to fake opinions—authorities which did not stand for the propositions asserted, arose from inapposite jurisdictions, or included inaccurate quotations. She signed the Motion and certified compliance with Rule 11. She did not personally double check the Motion to validate all case citations or to ensure the ultimate accuracy of the filling. Lead Counsel’s defense her firm’s new lawyer used artificial intelligence “unbeknownst” to her firm “rings completely hollow, because [Lead Counsel] had a duty to know by reviewing the document before signing her name to it. Her decision to knowingly sign a brief that she had not meaningfully reviewed was hers and hers alone.”
Opposing counsel then identified a false quotation in the Motion in its Opposition and on the same day Anderson and Associates staff discovered the law clerk who performed the legal research for the Motion had used artificial intelligence without disclosure in two unrelated cases. Lead Counsel and her firm did not review the Motion for additional citation errors. They did not question the law clerk about the research underlying the Motion. Lead Counsel instead filed a reply brief one week later and waited until we identified multiple false citations the next day. Lead Counsel had the opportunity to review the filing, identify erroneous citations, and notify us. The burden should not have fallen on us to expend judicial resources identifying blatantly false cites.
Only after we issued our Order to show cause did Lead Counsel follow up with the new lawyer about the citations in the Motion. The law clerk provided a spreadsheet explaining the cited authorities. Lead Counsel reports “at least two [artificial intelligence] detectors indicated that the case explanations . . . given by the Law Clerk . . . were also 100% [artificial intelligence] generated.” Lead Counsel’s response identifies no point at which she examined the cited authorities, confirmed their existence, or assessed whether they supported the propositions asserted in the Motion. Even after we raised concerns, Lead Counsel’s response describes the use of automated tools to evaluate the law clerk’s work rather than independent review of the case law.”
The court sanctioned Lead Counsel $4000.
The court was perhaps kinder to Local Counsel. The court explains: “We first address Local Counsel’s emphasis on the Motion’s asserted non-frivolous substance and partial success. This framing misses the point. The presence of some meritorious arguments does not excuse the inclusion of others supported by inaccurate, misleading, or fictitious citations. The Supreme Court through Rule 11 asks whether an attorney conducted a reasonable inquiry before signing and filing each legal contention presented to us. Nor does partial success relieve this Chambers of the burden of independently verifying and scrutinizing legal authority certified as accurate by Attorneys Anderson and Goldin. We were required to identify and disregard numerous fabricated citations before reaching the merits of any argument. Rule 11 exists to ensure courts may rely on the accuracy of the legal authority presented to them, not to excuse errors because some arguments ultimately succeed. We cannot excuse false citations because we partially granted the requested relief; we do not allow false submissions when the arguments do not prevail but excuse them if the arguments prevail.
Local Counsel erred in material respects. But the most glaring is based on his near-blind acceptance of papers drafted by an attorney not admitted to the Bar of this Court and his filing of those papers under his own name without checking the cited legal authority. Local counsel is not a rubber stamp. Local Counsel accepted another attorney’s work product without performing basic due diligence and then signed his name to this work product.
At the same time Local Counsel has stepped forward. He accepted responsibility and completed continuing legal education. We find no basis he will continue to engage in local counsel practice at this apparently one-time level of disregard. But Rule 11 sanctions serve not only to address past conduct. They exist to deter repetition of similar conduct by others. Local Counsel’s conduct and today’s sanction upon him serve as an important lesson for lawyers serving as local counsel.
We find a non-monetary sanction is most appropriate as an instructional measure. Local Counsel shall send a cover letter to the President of the Philadelphia Intellectual Property Lawyers Association enclosing today’s Order, this Memorandum, and his artificial intelligence policy and respectfully advise the President of our request these attachments be shared with the Association’s membership during its next Association membership meeting as a lesson on the risks of artificial intelligence and the duties of local counsel as members of the Bar of this Court.”
Note: I removed the names of the lawyers involved from this blog post. The purpose of this blog is to instruct and warn lawyers, not to call people out or embarrass them. I’m sure both lawyers regret this error and have taken steps to make sure it does not happen again.
Edward X. Clinton, Jr.









