State Appellate Courts and AI Hallucination Sanctions: The 2026 Trend

The 2026 AI-hallucination sanctions dataset is not just a federal-court story. State appellate courts across the U.S. have been entering their own orders in a steady flow throughout the year, at dollar amounts that in some cases exceed federal sanctions in comparable postures. If your practice is state-court-heavy — family law, personal injury, small-dollar commercial disputes, criminal appeals — you cannot treat this line of authority as federal-only. This post walks the state-court arc of the 2026 dataset and the specific patterns worth watching.

Boatner v. Hickerson: a $10,000 CA Missouri sanction

Boatner v. Hickerson, decided in the Missouri Court of Appeals on June 2, 2026, entered a $10,000 monetary sanction. This is one of several 2026 state-court cases that match federal-court penalty magnitudes. The precedent is squarely in the state-court appellate line — Kruse v. Karlen (Mo. Ct. App. E.D., 2024, $10,000) established the anchor in that state, and Boatner extends the line.

Cassata v. Michael Macrina Architect: $10,000 in New York Supreme

Cassata v. Michael Macrina Architect, P.C., decided in the Supreme Court of New York on January 27, 2026, entered a $10,000 monetary sanction and struck the brief. The struck-brief remedy is common in state-court AI-hallucination orders because state court practice is often paper-heavier than federal court and the striking of a brief has more immediate consequences for the underlying dispute’s trajectory.

Doiban v. Oregon Liquor and Cannabis Commission: $10,000 CA Oregon

Doiban v. Oregon Liquor and Cannabis Commission, decided in the Oregon Court of Appeals on March 18, 2026, entered a $10,000 monetary sanction. Oregon appears repeatedly in the 2026 dataset — Couvrette v. Wisnovsky ($110,204) is federal-court in D. Oregon, but Doiban, Carol L. Williams v. Tracy Honl ($8,044 at CA Oregon, April 2026), Mary McGreevy v. Adam Witkin ($500 at SC Oregon, June 2026), and State v. Dixon ($100 at CA Oregon, July 2026) are all state-court. The Oregon appellate line is one of the most active state-court AI-sanction lines nationally.

Landberg v. City of New York: appellate-division-level order

Landberg v City of New York, decided in the Court of Appeals of New York (2d Department) on June 23, 2026, carries a $10,500 monetary sanction. This is one of the higher-dollar 2026 state-court AI-sanction orders and one of the clearest appellate-court statements that the state appellate bench is taking the AI-citation problem as seriously as the federal district benches.

Higher-dollar SC Alabama order: Ibach and Stewart

Laurie Ibach and Mark Stewart v. Bruce Stewart, decided in the Supreme Court of Alabama on April 24, 2026, entered an adverse-costs order, doubled costs, a filing prohibition, and a bar referral, totaling $17,200 in monetary exposure. This is a state-court order that reaches into the same remedy toolkit federal courts have been using — filing prohibition specifically parallels the pro hac vice revocation remedy, adapted to a state-court context where pro hac vice is not the operative concept.

Why state courts are moving in parallel with federal courts

Three overlapping reasons. First, most state jurisdictions have rules analogous to Rule 11 (or courts with inherent authority reaching the same conduct). Second, the same AI-drafting tools that produce hallucinated citations in federal briefs produce them in state-court briefs — the fact pattern is not federal-specific. Third, state-court judges read federal-court sanctions orders and adopt the remedies with adjustment for their own procedural context. The state-court arc in 2026 is not a delayed echo of the federal arc; it is a parallel line.

Practical implications for state-court practices

A state-court-focused practice that has been reading “AI hallucination sanctions” as a federal-court problem is under-priced on this exposure. The 2026 state-court dataset carries orders at magnitudes ($10,000 monetary, $17,200 combined) that match or exceed most federal district-court orders. If your practice is state-court-heavy, your AI-use policy and verification workflow should track your state’s appellate opinions, not just federal opinions.

Common questions

Do state-court AI-sanction orders get published as widely as federal orders?

No, on average. Federal orders are more consistently available on PACER and reach the Charlotin database more quickly. Some state orders take months to surface publicly. Firms that track only Westlaw or Lexis reported state-court decisions may be missing several state orders as of any given cutoff.

Does the Missouri $10,000 Kruse v. Karlen anchor still control there?

Kruse v. Karlen remains the leading pre-2026 Missouri Court of Appeals AI-sanction opinion. The 2026 Boatner v. Hickerson $10,000 order matches the anchor rather than exceeds it, suggesting the state bench is settling on $10,000 as its baseline for meaningful AI-hallucination sanctions.

Verify a brief before you file it →

Per-case Analysis & Learnings

Ibach and Stewart v. Bruce Stewart (SC Alabama)

Analysis & Learnings

Working from the Ibach docket — $17,200 combined (adverse-costs order + doubled costs) + Filing Prohibition + Bar Referral, Supreme Court of Alabama, April 24 2026 — the state-court remedy stack matches or exceeds federal severity.

The verification step that would have caught this

The court flagged fabricated Nebraska, Alabama, and Illinois appellate opinions plus false quotations attributed to Ex parte Helms, Ex parte Seabol, and Janowiak v. Tiesi. Every fabricated citation is caught by existence check against the relevant state reporter. Every false quotation is caught by literal string-match within the cited opinion. The full six-citation failure set is trivially caught by a three-check verifier.

Pattern this fits across the 2026 docket

Ibach shows the state-appellate courts converging on the same layered-remedy pattern as federal district courts. Filing prohibition is the state analog of the pro hac vice revocation used in Withers v. City of Aberdeen (N.D. Miss., June 2026) — same functional consequence, different procedural label. Doubled costs is a state-court fee-shift analog to federal adverse-costs orders.

Concrete process changes a bar hearing report would want to see

• State-court cites treated with the same verification rigor as federal cites — no leniency assumption.
• Ex parte and unpublished state-court opinions get an extra manual pass because reporter coverage is thinner and hallucination detection is harder.
• Log the verifier check in the appellate record so the panel sees the certification on submission.

Cost math against a $29/mo verification subscription

$17,200 direct exposure + filing prohibition (functionally career-scale for an Alabama-only practice) + doubled costs (a case-size-scaling number). Against $29/mo Solo, the direct exposure alone is 49 years of subscription — before you price the filing prohibition.

What NOT to do in the aftermath

Do not assume state courts are softer than federal on AI-hallucination sanctions. SC Alabama’s remedy stack in Ibach is arguably harsher than several federal district-court orders in the same 2026 batch.

Boatner v. Hickerson (Missouri Court of Appeals)

Analysis & Learnings

From the Boatner docket — $10,000 monetary sanction with a ‘fraud on the Court’ finding, Missouri Court of Appeals, June 2 2026 — the failure set is unusually clean: four fully fabricated cases and nothing more subtle.

The verification step that would have caught this

The court identified four cases that do not exist: Davis v. Bess, Jones v. Jones, Kelley v. Kelley, and Stein v. Steeplechase Condominiums. An existence-only check — the fastest and cheapest of the three verification layers — catches four of four in seconds.

Pattern this fits across the 2026 docket

Boatner extends the Missouri Court of Appeals line established by Kruse v. Karlen (Mo. Ct. App. E.D., 2024, $10,000). The 2026 order matches rather than exceeds the anchor, suggesting the Missouri state bench has settled on $10,000 as the baseline monetary component for AI-hallucination sanctions at the appellate level.

Concrete process changes a bar hearing report would want to see

• Existence check on every cited case as a non-negotiable pre-filing gate — nothing else, if that is all the budget allows.
• If a citation cannot be resolved to a live public docket, it does not enter the brief.
• Named sign-off on the appellate brief certifying the existence check ran, so the record shows the certification if a Boatner-shape question later arises.

Cost math against a $29/mo verification subscription

$10,000 / $29 = 345 months = 28 years of Solo Citation Safe subscription. Against Suite at $99/mo, it is 8 years. Existence checks alone would have caught 100% of the fabricated cites here — this is the case-teardown that most emphatically proves the ROI of even the cheapest verification workflow.

What NOT to do in the aftermath

Do not dismiss existence check as ‘beneath’ a serious appellate practice. Boatner’s four-of-four fabrications were the entire failure set; a five-second lookup would have avoided the ‘fraud on the Court’ finding and its downstream disciplinary exposure.