City of Dickinson v. Helgeson
Supreme Court of North Dakota · N.D. Sup. Ct. · North Dakota bar guidance
Conduct
Pro se vexatious-litigant appellant cited five fictitious cases plus erroneous citations in N.D. Supreme Court appellate brief.
Consequence
Vexatious litigant designation affirmed; $500 sanction imposed under N.D.R. App. P. 13 and 28(l) for fictitious citations.
Lesson
First N.D. Supreme Court AI-citation sanctions order, with explicit endorsement of AI use 'when verified' alongside the sanction.
Verified May 7, 2026
- Citation
- City of Dickinson v. Helgeson, 2026 ND 34, --- N.W.3d ---- (N.D. Feb. 12, 2026)
- Decided
- February 12, 2026
Summary
Pro se appellant Seth Neil Helgeson filed an appellate brief in the North Dakota Supreme Court challenging the district court's order designating him a vexatious litigant after a jury found him in violation of Dickinson Municipal Code § 58-705 for failure to display license plates. The City of Dickinson identified six fictitious citations in Helgeson's brief. Justice Daniel J. Crothers, writing for a unanimous panel, found that Helgeson cited several nonexistent cases whose "offered citations lead to different cases that do not support his claims, and a search of the provided case names also is fruitless." The court tabulated five fictitious citations alongside their closest-genuine analogues. Helgeson did not defend or explain his use of the fictitious cases.
- AI tool:
- Implied (court cited Mezu v. Mezu for proposition that 'fake or nonexistent legal citations typically are the result of AI hallucinations')
- Sanction amount:
- $500
What sanction did the court impose?
The court affirmed the vexatious litigant designation and granted the City's request for sanctions, awarding $500 against Helgeson under N.D.R. App. P. 13 and 28(l). The court held the underlying traffic infraction was noncriminal, so the district court had jurisdiction under N.D. Sup. Ct. Admin. R. 58 to designate Helgeson a vexatious litigant. The court rejected Helgeson's constitutional challenges to the vexatious-litigant rule. Notably, the court "warn[ed] all litigants that using erroneous citation to authority, and providing courts with citation to fictitious cases, exposes the filing party to the imposition of sanctions appropriate under the circumstances."
Why does City of Dickinson v. Helgeson matter for law firms using AI?
Helgeson is the most procedurally significant case in this batch because it is a state supreme court decision rather than a single-judge district-court order. North Dakota now has a statewide judicial holding that “[f]ake or nonexistent legal citations typically are the result of AI ‘hallucinations’” and that filing them subjects the filer to sanctions under N.D.R. App. P. 13 and 28(l). The opinion is unanimous: Lisa Fair McEvers, C.J., and Justices Crothers, Tufte, Jensen, and Bahr.
Two textual moves are worth noting for firm-policy purposes. First, the court explicitly endorses AI use: “By this statement and citation, we do not criticize the use of AI or AI-assisted tools. To the contrary, we encourage and embrace the use of technology to improve the work product of all litigants, whether represented or self-represented.” Second, the court frames verification as the litigant’s responsibility regardless of AI provenance: “[I]t does not matter whether Helgeson’s fictitious cases and erroneous citations were AI-generated or the result of careless work. Rather, regardless of how the errors came to be, he is responsible for the consequences of his errors.” The pairing matters for any firm drafting an internal AI-use policy in North Dakota: the statewide rule is “use is fine, fabrication is not.” The pro se posture and traffic-infraction underlying offense make this a low-stakes case factually, but the rule it lays down applies equally to represented practitioners on appellate 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.
- Cite Helgeson when arguing in N.D. courts that fictitious-citation sanctions are now governed by an explicit statewide rule, not an ad hoc inherent-power exercise.
- The opinion's footnote citing Mezu v. Mezu and Noland v. Land of the Free for the AI-hallucination diagnosis is the operative N.D. authority on the diagnostic question.
- Document AI-tool use, but pair it with cite-verification logs: Crothers signaled the court will not punish use, only failure to verify.
Sources
Primary sources
Further reading
- Document mirror (Damien Charlotin hallucination database, Westlaw printout)
- Justia (legal aggregator)
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.