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Esterra Commons Venture, LLC dba Verde Esterra Park v. Justin Norton

Court
CA Washington (d1)
Jurisdiction
USA
Decided
2026-03-16
AI tool
Implied
Outcome
Warning
Monetary penalty
None reported

What was hallucinated

Fabricated: Case Law | Appellant cited a case that does not appear to exist; court notes the citation is fictitious and not part of the record. || Fabricated: Case Law | Appellant proffered a non-existent case citation in supplemental authority; court notes it does not exist. || Fabricated: Legal Norm | Appellant quoted language claiming it appears in RCW 59.18.410; court found the quoted language is not in that statute. || Fabricated: Legal Norm | Appellant cited statutory language and a case name together that the court indicates do not appear to exist as cited.

Sanction teardown · CA Washington (d1), USA · 2026-03-16

Esterra Commons Venture, LLC dba Verde Esterra Park v. Justin Norton

What happened

In CA Washington (d1), USA, a filing relied on an unnamed/unconfirmed AI tool to help draft legal argument. The court identified the following problems with the citations in that filing:

  • Fabricated (Case Law)
    Appellant cited a case that does not appear to exist; court notes the citation is fictitious and not part of the record.
  • Fabricated (Case Law)
    Appellant proffered a non-existent case citation in supplemental authority; court notes it does not exist.
  • Fabricated (Legal Norm)
    Appellant quoted language claiming it appears in RCW 59.18.410; court found the quoted language is not in that statute.
  • Fabricated (Legal Norm)
    Appellant cited statutory language and a case name together that the court indicates do not appear to exist as cited.

Which AI tool

an unnamed/unconfirmed AI tool. Note: Charlotin's public database records tool attribution only where a court order, brief, or reporting on the matter states it explicitly; "unidentified" or "implied" means the record indicates AI use but does not name a specific product — we do not guess.

Outcome

Warning

How Citation Safe would have caught this

Citation Safe runs three deterministic layers before a brief is filed: (1) does the citation exist against CourtListener's database of published opinions, (2) if quoted, does that exact language appear in the source, (3) does the cited case actually support the proposition it is cited for. Fabricated case citations fail Layer 1. Fabricated or misattributed quotations fail Layer 2 even when the underlying case is real. Misrepresented holdings — a real case cited for a proposition it does not support — are the target of Layer 3. None of these checks involve asking another language model whether the citation looks right; they are lookups and text-matches against the actual source, which is why a hallucinated citation has to survive a direct lookup against the authoritative source — not another model's opinion — to earn a VERIFIED stamp; our measured false-verify rate is published live at /quality.

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Source: https://www.damiencharlotin.com/documents/1688/Esterra_v._Norton_USA_16_March_2026.pdf, via Damien Charlotin's public AI Hallucination Cases Database (CC0).

Source: https://www.damiencharlotin.com/documents/1688/Esterra_v._Norton_USA_16_March_2026.pdf

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