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AI Labs · updated 2026-06-03 · methodology v2.1

Finding on 'Q005 Probe' for Claude Opus 4.7 with web search ON

RLB Citation ID: RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q005-Opus47
What the RLB Specialist Panel found

Finding on 'Q005 Probe' for Claude Opus 4.7 with web search ON

  • Question (paraphrased to protect IP): A payment processor issuing a stablecoin backed by reserves held at an OCC-chartered national trust bank asked whether its stablecoin qualifies as a 'payment stablecoin' under the current CFTC digital asset collateral framework — covering both the original December 2025 package and subsequent updates — and whether futures commission merchants can accept it as customer margin collateral.
  • AI's response: "Staff Letter 25-40 was reissued as Staff Letter 26-05 on February 6, 2026. The substantive change was a revision to the definition of 'payment stablecoin' to add national trust banks as permitted issuers."
  • Regulator's text: Staff Letter 25-40 was reissued as Staff Letter 26-05 with a limited revision expanding the payment stablecoin definition to include stablecoins issued by national trust banks. The OCC Interpretive Letter 1183 provides the hook for national trust bank eligibility.
  • Why the AI went wrong: The model produced a specific reissuance date — "February 6, 2026" — that has no basis in the regulator's record; the date appears to be fabricated from inference rather than retrieved from a primary source. The model also failed to surface OCC Interpretive Letter 1183 as the specific regulatory instrument anchoring national trust bank eligibility — the detail that determines whether a particular issuer actually qualifies — defaulting instead to a structural description of the amendment that omits the operative cross-reference.
  • Cited source(s):
  • https://www.lexology.com/library/detail.aspx?g=851ee073-7470-4751-a5e4-f92434... — Pretextual
Impact for this audience

The fabricated reissuance date implicates the training corpus's coverage of this instrument's amendment cycle: the model had enough information to describe the amendment's structural effect but not enough to retrieve the actual date, producing a plausible confabulation instead of a retrieval failure. The omission of OCC Interpretive Letter 1183 as the eligibility hook implicates the retrieval stack's handling of cross-document dependencies — the model resolved the 'what changed' question without following the cross-reference to 'why this charter type qualifies,' a gap in how the RAG layer traverses inter-document citations.

References — raw findings (per AI model)
This finding also affects
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Cite this finding

Each finding has a stable Citation ID (RLB-F-… for aggregated case-study findings, RLB-H-… for raw per-model hallucinations) — like a DOI, the ID always resolves to the canonical finding even if URLs change.

RLB Citation ID: RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q005-Opus47
Plain text Download 
RegLeg Specialist Panel (2026). "Finding on 'Q005 Probe' for Claude Opus 4.7 with web search ON — AI Labs." Citation ID: RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q005-Opus47. RegLegBrief AI Hallucination Research, published 2026-06-03. https://reglegbrief.com/regulators/j3/us/cftc/digital-asset-collateral-tokenized-assets-staff-guidance-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-005--opus-47-websearch/
APA 7th edition Download 
RegLeg Specialist Panel. (2026). Finding on 'Q005 Probe' for Claude Opus 4.7 with web search ON [Hallucination finding RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q005-Opus47]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/regulators/j3/us/cftc/digital-asset-collateral-tokenized-assets-staff-guidance-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-005--opus-47-websearch/
Bluebook / OSCOLA (US + UK legal) Download 
RegLeg Specialist Panel, Finding on 'Q005 Probe' for Claude Opus 4.7 with web search ON [RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q005-Opus47], RegLegBrief AI Hallucination Research (June 03, 2026), https://reglegbrief.com/regulators/j3/us/cftc/digital-asset-collateral-tokenized-assets-staff-guidance-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-005--opus-47-websearch/.
BibTeX Download 
@misc{reglegbrief_RLB_H_US_CFTC_DIGITAL_ASSET_COLLATERAL_TOKENIZED_ASSETS_STAFF_GUIDANCE_2025_Q005_Opus47,
  author    = {RegLeg Specialist Panel},
  title     = {Finding on 'Q005 Probe' for Claude Opus 4.7 with web search ON},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: RLB-H-US-CFTC-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-Q005-Opus47},
  url       = {https://reglegbrief.com/regulators/j3/us/cftc/digital-asset-collateral-tokenized-assets-staff-guidance-2025/whitepaper/finding/US-CFTC-US-001-DIGITAL-ASSET-COLLATERAL-TOKENIZED-ASSETS-STAFF-GUIDANCE-2025-v1-005--opus-47-websearch/}
}
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