AI Hallucination Research › Audiences › Sectors › Singapore › Retail Banking › Legal › Detail › Finding
Retail Banking × Legal — 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 (Singapore) (Regulator portal: https://www.mas.gov.sg)
  • What AI assistants typically say: The AI correctly noted that a separate notice applies to financial holding companies but then supplied a specific notice designation — "Notice FHC-N637" — that has no verified existence. The AI constructed this label by analogy, combining the bank notice number with a prefix derived from the Financial Holding Companies Act, presenting the fabricated designation as a factual reference.
  • What the regulator actually says: MAS Notice 637 sets out risk-based capital adequacy requirements applicable to banks. The regulatory framework for financial holding companies is governed by separate instruments issued under the Financial Holding Companies Act; the specific notice designation applicable to such entities must be verified directly from MAS published materials.
  • Why the AI went wrong: The AI recognised that a separate regulatory instrument exists but lacked precise knowledge of its designation. Rather than flagging uncertainty, it generated a plausible-sounding label by pattern-matching from known information — a behaviour that produces a confident, structurally correct-looking answer that is factually unreliable.
  • Cited source(s):
Impact for this audience

A Legal team relying on the AI's fabricated 'Notice FHC-N637' designation could incorporate that reference into a regulatory mapping document, a board paper on group structure, or an internal policy governing the firm's financial holding company — none of which would survive regulatory scrutiny. If the firm acts on the wrong notice designation when advising on the capital adequacy obligations of a holding entity, it risks advising that entity to comply with a framework that does not apply, or failing to identify the framework that does. MAS has broad supervisory and enforcement powers under the Financial Holding Companies Act; a firm that demonstrates it was working from an AI-generated fabrication rather than verified MAS materials would face significant questions about the adequacy of its Legal function's oversight processes, and could face directions, undertakings, or financial penalties depending on the consequence of the error.

References — raw findings (per AI model)
This finding also affects
Next finding → Finding 2. Misidentification of yellow-highlighting convention in MAS amendment notice
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 × Legal — Singapore." Citation ID: . RegLegBrief AI Hallucination Research, published 2026-05-28. https://reglegbrief.com/audiences/sectors/sg/retail_banking/legal/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/legal/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/legal/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/legal/finding/q-NOTICE-637-CAPITAL-ADEQUACY-BANKS-2025-v1-010/}
}
← Back to case study summary Case study detail →
About Citation IDs →