{"data":{"event":{"id":"17f7481d-470b-466a-bb57-177641ce7db7","slug":"mata-v-avianca-chatgpt-citations","title":"Lawyers sanctioned after ChatGPT fabricates cases in Mata v. Avianca","short_summary":"On 22 June 2023 the S.D.N.Y. sanctioned attorneys $5,000 for submitting nonexistent opinions generated by ChatGPT in Roberto Mata’s personal-injury suit against Avianca.","full_description":"Judge P. Kevin Castel found that counsel submitted fake citations and then doubled down after the court asked for copies. The order became the template warning that lawyers must verify AI research. Harm is to the integrity of a federal proceeding and to the client’s representation, not a large population injury.","ledger_type":"harm","primary_domain_id":"056250cf-05f4-4116-957c-78323ed7f8cf","event_status":"verified","event_date":"2023-06-22T00:00:00.000Z","discovery_date":"2023-06-22T00:00:00.000Z","first_published_date":"2023-06-22T00:00:00.000Z","last_reviewed_date":"2023-06-22T00:00:00.000Z","geographic_scope":"United States (S.D.N.Y.)","affected_population":"Parties and court in Mata v. Avianca; legal profession via precedent","base_impact_tier":2,"base_score":"3.00","attribution_multiplier":"0.3500","evidence_multiplier":"1.0000","realization_multiplier":"1.0000","durability_multiplier":"0.4000","current_event_score":"0.210000","confidence_level":"high","score_explanation":"Documented court harm of limited scale (tier 2). Modest model attribution because lawyers had a duty to check. Court record is conclusive evidence and realization. Precedent is lasting; the $5,000 sanction is small.","methodology_version_id":"d7881163-fb23-4e71-8625-bac1a8662c0f","original_methodology_version_id":"d7881163-fb23-4e71-8625-bac1a8662c0f","published_at":"2023-06-22T00:00:00.000Z","created_at":"2026-09-13T20:47:20.075Z","updated_at":"2026-09-13T20:47:20.075Z","flags":[],"domain_name":"Computer Science","domain_slug":"computer-science","methodology_version":"0.1"},"contributions":[{"id":"c04c9b91-4dfb-4054-83d5-c34d4ff9f5df","event_id":"17f7481d-470b-466a-bb57-177641ce7db7","model_id":"526ec3f2-2d3c-4f79-9606-a23be76b9b8c","role_description":"Generated fabricated case names, quotes, and fake opinions used in filings.","attribution_multiplier":"0.3500","credit_share":"0.5000","contribution_score":"0.210000","attribution_rationale":"ChatGPT produced the false authorities; attorneys filed them without verification.","attribution_confidence":"medium","first_used_date":"2023-04-11T00:00:00.000Z","model_version_if_known":null,"review_status":"approved","created_at":"2026-09-13T20:47:20.075Z","model_slug":"chatgpt","model_name":"ChatGPT","identity_class":"named_release","is_internal":false,"family_name":"GPT","family_slug":"openai-gpt","organization_name":"OpenAI","organization_slug":"openai"}],"sources":[{"id":"919fca52-8ae1-4a43-9001-18c1b5a15334","event_id":"17f7481d-470b-466a-bb57-177641ce7db7","url":"https://law.justia.com/cases/federal/district-courts/new-york/nysdce/1:2022cv01461/575368/54/","canonical_url":"https://law.justia.com/cases/federal/district-courts/new-york/nysdce/1:2022cv01461/575368/54/","source_type":"regulatory_record","publisher":"U.S. District Court S.D.N.Y.","author":null,"publication_date":"2023-06-22T00:00:00.000Z","retrieved_at":"2026-09-13T20:47:20.075Z","title":"Mata v. Avianca, Inc., Opinion and Order on Sanctions","excerpt":null,"content_hash":null,"source_reliability_class":"medium","is_primary_source":true,"is_independent":true,"is_peer_reviewed":false,"archived_url":null,"created_at":"2026-09-13T20:47:20.075Z"},{"id":"f2d8fb42-c5cc-4ac7-ae8d-633af743a69f","event_id":"17f7481d-470b-466a-bb57-177641ce7db7","url":"https://casetext.com/case/mata-v-avianca-inc-2","canonical_url":"https://casetext.com/case/mata-v-avianca-inc-2","source_type":"regulatory_record","publisher":"Casetext","author":null,"publication_date":"2023-06-22T00:00:00.000Z","retrieved_at":"2026-09-13T20:47:20.075Z","title":"Mata v. Avianca, Inc., 678 F. Supp. 3d 443","excerpt":null,"content_hash":null,"source_reliability_class":"medium","is_primary_source":true,"is_independent":true,"is_peer_reviewed":false,"archived_url":null,"created_at":"2026-09-13T20:47:20.075Z"}],"claims":[{"id":"791f43b2-92f6-4344-873a-ddf99cbd67ff","event_id":"17f7481d-470b-466a-bb57-177641ce7db7","claim_text":"ChatGPT generated nonexistent judicial opinions that were filed in federal court, leading to Rule 11 sanctions.","claim_type":"outcome","claim_status":"supported","confidence_score":null,"created_at":"2026-09-13T20:47:20.075Z","updated_at":"2026-09-13T20:47:20.075Z"}],"revisions":[{"id":"1731e83f-ed4e-4087-97a7-e8f25edaf7de","event_id":"17f7481d-470b-466a-bb57-177641ce7db7","model_id":null,"previous_score":"0.000000","new_score":"0.210000","previous_factors":{},"new_factors":{"evidence":1,"base_score":3,"durability":0.4,"attribution":0.35,"realization":1},"change_reason":"Initial adjudicated seed score under methodology 0.1.","trigger_type":"seed","trigger_source_ids":null,"reviewer_id":null,"review_status":"published","created_at":"2026-09-13T20:47:20.075Z"}],"secondary":[]},"methodology_version":"0.1"}