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Question · AI Citation Sanctions

What was Johnson v. Dunn and what does it mean for AI legal tools?

Since Mata v.

AboutAI Citation Sanctions
Legal forceBinding orders in individual cases; persuasive elsewhere
Applies fromOngoing since June 2023
Checked21 Oct 2026

01 / The answer

The short answer

Johnson v. Dunn is a July 23, 2025 sanctions order from the federal court in the Northern District of Alabama. Three Butler Snow lawyers defending a former Alabama prisons commissioner filed motions citing cases that ChatGPT had invented. The court said reprimands and modest fines were not deterring this conduct, so it publicly reprimanded the three lawyers, removed them from the case, ordered the opinion published and sent it to the Alabama State Bar. The lesson for AI legal tools is that the signing lawyer, not the tool, answers for every citation.
AI Citation Sanctions · checked 21 Oct 2026

02 / The rule

What AI Citation Sanctions requires

Since Mata v. Avianca in 2023, courts have sanctioned lawyers for filing briefs with fake or misdescribed authority produced by AI tools, under Rule 11, state equivalents and inherent power. Sanctions have escalated from small fines to public reprimands, disqualification, fee-shifting and bar referrals, so any AI-assisted drafting needs a human verification step before filing.

  1. 01Read and confirm every cited case, quotation and statute exists and supports the stated proposition before signing (Fed. R. Civ. P. 11(b)(2)).
  2. 02Treat AI output as unverified research; the signing lawyer stays personally responsible for every citation.
  3. 03Correct false citations promptly and candidly once discovered; do not compound them with false explanations to the court.
  4. 04Supervise associates, staff and contract lawyers who use AI tools, and enforce the firm's verification policy in practice.

03 / Records

Records to keep

  1. 01Per-filing citation-check record showing who verified each authority
  2. 02Firm AI-use policy and dated training records
  3. 03List of approved AI tools and their vetting notes
  4. 04Supervision sign-off on briefs drafted with AI assistance

Optional evidence · where Planisphere fits

Keep a record anyone can check

When your team meets a duty, Planisphere can seal the event it reports as a receipt.

01 · Your teamRecord the event

A disclosure shown, a review signed, a model change approved: the event your system reports.

02 · PlanisphereSeal it

The event becomes a sealed receipt, dated and attributed to whoever is signed in.

03 · AnyoneCheck it

Paste the receipt into Verify. No account or key.

A record supports your compliance evidence process. It is not a legal finding or a certification. Systems that call Planisphere's gate API can also hold or refuse an action before it runs.

SOURCES

Go back to the source

PRIMARY
PRIMARY
Johnson v. Dunn, No. 2:21-cv-1701-AMM, Sanctions Order (Doc. 204, July 23, 2025)

U.S. District Court, N.D. Ala. (docket copy via Docket Alarm)

PRIMARY
Federal Rules of Civil Procedure (Rule 11)

Administrative Office of the U.S. Courts

RELATED

Related: AI Citation Sanctions: the full guide · Can I be sanctioned for AI-hallucinated citations? · Does having an AI policy protect my firm from sanctions? · How do I verify AI legal research before filing?