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Retail Banking × Compliance — Singapore · published 2026-05-28 · methodology v2.1

Fabricated notice designation for financial holding companies

What the RLB Specialist Panel found

1. Fabricated notice designation for financial holding companies

  • Question (paraphrased to protect IP): Does MAS Notice 637 on risk-based capital adequacy apply to financial holding companies incorporated in Singapore, or is there a separate MAS notice for them, and if so, what is it?
  • Source regulation: MAS Notice 637 (Risk Based Capital Adequacy Requirements for Banks) — Monetary Authority of Singapore (Regulator portal: https://www.mas.gov.sg)
  • What AI assistants typically say: AI tools correctly identified that a separate notice applies to financial holding companies rather than MAS Notice 637, but then fabricated a specific notice designation — "Notice FHC-N637" — apparently constructed by combining the Financial Holding Companies Act prefix with the bank notice number by analogy.
  • What the regulator actually says: No regulator excerpt was available for direct quotation in this finding; readers should verify the applicable FHC notice designation directly via the MAS regulatory portal.
  • Why the AI went wrong: The AI correctly reasoned that a separate instrument must exist for financial holding companies, then invented a plausible-sounding label for that instrument rather than acknowledging that it could not retrieve the actual designation. The fabricated label is indistinguishable in format from a genuine MAS notice reference, making it particularly likely to be accepted and propagated without verification.
  • Cited source(s):
Impact for this audience

A Compliance team preparing guidance on the regulatory perimeter — for example, advising treasury or risk on which group entities are subject to MAS capital requirements — could incorporate 'Notice FHC-N637' as a genuine regulatory reference. That fabricated label would then appear in internal policies, board papers, or communications with MAS. When MAS or an external auditor tests the firm's regulatory mapping, the citation to a non-existent notice would expose a material gap in the firm's regulatory understanding, potentially triggering a supervisory request for remediation of all downstream policies built on that reference. The cost is not limited to correction of the label — it includes a full review of any entity-scope analysis that relied on the AI's answer.

References — raw findings (per AI model)
This finding also affects
Next finding → Finding 2. Mischaracterisation of yellow highlighting in MAS Notice 637 amendment PDFs
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.

Plain text 
RegLeg Specialist Panel (2026). "Fabricated notice designation for financial holding companies — Retail Banking × Compliance — Singapore." Citation ID: . RegLegBrief AI Hallucination Research, published 2026-05-28. https://reglegbrief.com/audiences/sectors/sg/retail_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/
APA 7th edition 
RegLeg Specialist Panel. (2026). Fabricated notice designation for financial holding companies [Hallucination finding ]. RegLegBrief AI Hallucination Research. https://reglegbrief.com/audiences/sectors/sg/retail_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/
Bluebook / OSCOLA (US + UK legal) 
RegLeg Specialist Panel, Fabricated notice designation for financial holding companies [], RegLegBrief AI Hallucination Research (May 28, 2026), https://reglegbrief.com/audiences/sectors/sg/retail_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/.
BibTeX 
@misc{reglegbrief_,
  author    = {RegLeg Specialist Panel},
  title     = {Fabricated notice designation for financial holding companies},
  year      = {2026},
  publisher = {RegLegBrief AI Hallucination Research},
  note      = {Hallucination finding Citation ID: },
  url       = {https://reglegbrief.com/audiences/sectors/sg/retail_banking/compliance/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/}
}
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