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Practitioners — Financial Advisers · Last updated 11 Jun 2026 · methodology v2.3 · Hallucination Register
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AI Hallucination on Promoting the Harmonisation of Application Programming Interfaces to Enhance Cross-Border Payments: Recommendations and Toolkit for Financial Advisers in international jurisdictions

Financial Advisers: AI summaries of CPMI Cross-Border API Harmonisation 2024 may understate professional obligations

Financial advisers tracking CPMI's API harmonisation programme for cross-border payments are increasingly using AI to compile fast payment system landscape data for client market briefings, prepare central-bank-versus-private operator splits for institutional investor decks, draft horizon-scan summaries on the SARB pre-validation workstream, generate strategy memos on the 10 CPMI recommendations, and verify topline FPS counts and connectivity figures against the regulator's published statements. The RLB Specialist Panel tested how that AI usage performs against the regulator's own primary text on CPMI's October 2024 d224 report and the related CPMI Brief and speech series.

The audit surfaced four substantive failure modes that the AI subjects delivered with regulator-fluent confidence.

Numeric Drift and False-Negative Availability Claim on CPMI API Harmonisation for Cross-Border Payments. Two frontier AI models tested by the RLB Specialist Panel returned confident, citable answers across the panel's CPMI substrate-bound question set on the October 2024 d224 report and the related CPMI Brief and speech series. The panel binds each AI finding to verbatim regulator-issued source text held as primary substrate.

Across the 2 findings in this Financial Advisers briefing, the AI subjects returned a global fast payment system count of 57 sourced to the 2025 monitoring survey sample, when the authoritative CPMI figure is 70+; stated that the central-bank versus private operator split of global fast payment systems is not enumerated in public CPMI sources, when the November 2023 CPMI speech gives exact percentages.

A market briefing that quotes a global fast payment system count of 57, sourced to the 2025 CPMI monitoring survey sample, understates global connectivity by roughly 20 percent against the regulator's stated 70+ figure. A research memo that records the central-bank versus private operator split as 'not available in public CPMI sources' misses an explicit 40 percent / 35 percent split that the November 2023 CPMI speech records.

A client-facing strategy note that frames the SARB pre-validation workstream as 'no jurisdictional partner identified' positions the firm as one step behind a published regulator-bilateral workstream the next time the client researches the same question.

The findings are published with immutable RLB Citation IDs: RLB-H-INT-BIS-CPMI-API-HARMONISATION-CROSS-BORDER-2024-Q010-Opus47, RLB-H-INT-BIS-CPMI-API-HARMONISATION-CROSS-BORDER-2024-Q010-Sonnet46. The full audit is published at the CPMI API Harmonisation for Cross-Border Payments hub on RegLegBrief.com.

Executive Summary

The CPMI's October 2024 framework on harmonising application programming interfaces for cross-border payments sits across the surface that Financial Advisers in international jurisdictions touch in market briefings, client memos, and corridor-strategy advisory work. The 70-plus global fast payment systems landscape, the central-bank versus private operator mix, and the named jurisdictional implementation partners (such as the South African Reserve Bank on payment pre-validation) are the kind of factual detail that gets quoted into adviser-facing deliverables without independent verification.

In our research, AI tools issued responses on 2 questions on this regulation that, while phrased with authoritative confidence, misstated the regulator-published global FPS count and falsely declared a CPMI operational-split statistic unavailable. A Financial Adviser who uses AI to populate primary-source benchmark data on this regulation receives outputs that look correct, present cleanly in client materials, and contradict the primary record.

How AI gets this regulation wrong

The table below catalogues how AI tools erred when asked about this regulation in the contexts Financial Advisers most often encounter it. Failures cluster around AI substituting inference for retrieval, typically reading a category name, a publication abstract, or an adjacent CPMI speech and then generating structural detail that has no support in the regulator's own primary text. The AI does not flag the substitution; the inferred detail is presented in the same register as retrieved fact.

AI's Failure ModeCountAffected findings
0

What that means for your practice

The errors documented here translate into the wrong-deliverable risk category for Financial Advisers: a client memo, market briefing, or corridor strategy document that includes fabricated CPMI statistics or asserts non-existent data gaps. The downstream cost is reputational, clients act on the wrong figures, internal review reveals the error after circulation, or a regulator referencing the same CPMI primary source surfaces the discrepancy in supervisory dialogue.

Risk ImpactCountAffected findings
0

When this affects your work

Financial Advisers reach for AI on this regulation most often when assembling market briefings or corridor strategy memos that depend on CPMI benchmark statistics: how many fast payment systems are operational globally, which jurisdictions are linking cross-border, what the ownership split between central banks and private operators looks like across the universe. The benchmark data is published in CPMI's own primary sources (the November 2023 Tara Rice speech is the canonical reference for current-state FPS statistics), but those sources sit across multiple documents that AI tools are erratic in retrieving in full.

The risk is that a briefing built on an AI-sourced figure under-reports the global FPS universe, quoting the 2025 monitoring survey sample of 57 systems instead of the regulator-stated 70+, or asserts a data gap that does not exist. The client acts on a smaller landscape, the corridor strategy targets the wrong subset of jurisdictions, or the briefing simply omits a CPMI-published statistic the AI failed to find. None of these errors are dramatic on the surface; all of them are recoverable to the primary CPMI source within a single browser session.

The cost is the briefing that went out before that verification happened.

The findings at a glance

The table below summarises each finding from our research on this regulation for Financial Advisers, including a short title, the type of AI failure observed, and the citation reference for the finding card below.

#Finding titleTypeCitation ID
1Global FPS count compressed to 57 from 70+HallucinationRLB-F-INT-BIS-CPMI-API-HARMONISATION-CROSS-BORDER-2024-Q010
2Central-bank vs private FPS split falsely declared unavailableHallucinationRLB-F-INT-BIS-CPMI-API-HARMONISATION-CROSS-BORDER-2024-Q010

Aggregate impact

The two findings on this regulation cluster on the same underlying defect: AI tools substituted a smaller-scope source (a monitoring-survey sample) for an authoritative source (a CPMI speech documenting the universe figure), or denied that a published statistic exists when it does. For Financial Advisers building market briefings, the systemic exposure is that AI-sourced benchmark data on this regulation is not reliable for client-facing work. The errors here are recoverable to the primary CPMI publications within a single verification step; the risk is the briefing that ships before the verification happens.

The broader pattern across CPMI primary sources is that the regulator documents statistics in speeches and briefs that AI retrieval handles erratically, while the monitoring-survey outputs and aggregator coverage that AI tools handle better are precisely the documents that report sample-level figures rather than universe-level figures. A Financial Adviser who wants to rely on AI for CPMI benchmark data needs to know that this asymmetry exists, because the AI does not signal it: a sample number presented as a universe number reads the same as a correctly retrieved figure in the response.

What you should do

Treat AI-sourced CPMI benchmark statistics as a flag to verify, not as the figure to quote. The CPMI publication feed at bis.org/cpmi carries the speeches and briefs where current-state global FPS data is published, and the Tara Rice November 2023 speech in particular is the canonical primary source for the 70+ universe figure and the central-bank versus private operator split. A standing practice of confirming any AI-supplied CPMI statistic against the primary publication before it enters a briefing avoids the universe-versus-sample substitution that the AI does not flag.

Where AI tools do add value on this regulation is at the framing and orientation level: summarising why API harmonisation matters for cross-border payments, sketching the high-level structure of the 10 recommendations, or drafting an outline for a client briefing that will subsequently be populated with primary-source verified statistics. The risk concentrates where the AI moves from framing to quantitative claim or named institutional partnership. A simple verification protocol, every AI-sourced number on this regulation gets a primary-source check, is sufficient to keep adviser-facing deliverables reliable.

How RLB Can Help

RegLeg's Hallucination Research is built for exactly the deliverable workflow Financial Advisers run: market briefings, client memos, and corridor strategy notes where AI is used to accelerate the data-assembly stage. The published research catalogues where AI tools have produced confident but wrong answers on regulatory benchmark statistics, named institutional partnerships, and primary-source data availability claims. Knowing those failure patterns in advance lets an adviser apply targeted verification, checking the specific categories of claim that the research shows are unreliable, rather than blanket scepticism that would make AI assistance impractical.

For advisory practices that want to systematise this, RegLeg can run a confidential review of the firm's current AI-use practices in adviser workflows and return a prioritised list of where verification controls are missing or under-specified. The review is calibrated to adviser realities: time pressure, client-facing deliverable cycles, and the difference between framing AI use (low risk) and quantitative claim AI use (higher risk requiring primary-source verification).

RegLeg also develops CPD-aligned training content tailored to advisory contexts, scenario-based, grounded in real documented failures from the research, and designed for experienced advisers who do not need the AI 101 but do need a defensible protocol for using AI assistance on regulatory benchmark and statistical content.

Every finding on this page compares an AI subject's account of the rule against the regulator's verbatim text from the regulator's own portal. Both are linked. Each delta, its root causes, and impact analysis are documented and published with immutable Citation IDs.