This case belongs to a rare category of commercial litigation in which the court’s own established approach to document-led disputes, written admissions, and arithmetically determinable claims naturally directs the outcome toward a narrower range than most proceedings. The nine probability inputs (P1–P9) reflect that process — calibrated against the evidentiary record, the applicable law, and the five analytical factors below. AIOOJ v10.1: evidential and legal basis for every default value. Any adjustment must be supported by a specific new fact or legal development not reflected in the current calibration.
Probability analysis is not appropriate for every commercial dispute. Most cases turn on contested facts, credibility assessments, or uncertain documentary records where qualitative analysis is all that can responsibly be offered. This case is structurally different — not as an advocacy claim, but as a documented analytical matter. Five convergent structural factors explain why, in applying its own standard process and the body of case law governing document-led commercial disputes, a court would be expected to reach conclusions that fall within a narrower and more predictable range than most proceedings present.
Executed agreements with specific commission formulas; an amendment history across Korea and Japan sub-streams; 17 years of monthly statements; eight successive written explanations from Aegon; a General Manager’s written admission; a Finance Manager’s written acknowledgement; corrective payments; and a Deed with a documented demand and non-response. This is not a credibility contest — it is a dispute whose material facts are established by Aegon’s own record. The NSW Supreme Court Commercial List strongly favours document-led resolution.
D3.70 (2 August 2024): an Aegon General Manager confirmed in writing that actual premium data existed at reinsurer level and was deliberately not provided to the commission calculation team. The Finance Manager acknowledged the Korea and Japan table. The February 2024 corrective payment of $3,319,108 was made without deed of release — a partial admission under s.54 Limitation Act. CC-74 (October 2024): Aegon’s own admission that the Marketing Agreement provides no unilateral rate-change authority. Once admissions exist, the court’s attention shifts from fact-finding to legal consequence.
Aegon admitted in D3.70 that the actual premium bordereaux exist. The contractual verification right has not been honoured. Aegon exclusively holds the records that would resolve the dispute arithmetically. Under Jones v Dunkel, a court may draw an adverse inference that the withheld data would confirm Harrison’s position. Producing the data creates a higher award risk than not producing it — Aegon’s production risk runs upward. The conservative floor quantum ($56.7M) would increase on actual bordereaux.
Over 48 months (2020–2024), Aegon provided eight materially contradictory and mutually exclusive explanations for its commission calculation methodology. PCAOB AS 2401 and ISA 240 — the auditing profession’s established standards for identifying fraud risk, which forensic experts apply in litigation proceedings of this kind — treat a progression of mutually exclusive explanations as a primary indicator of deliberate concealment rather than innocent process failure. The cessation-date explanation alone shifted three times.
Most commercial disputes require the court to exercise judgment on uncertain matters: what was the reasonable price, what would have happened but for the breach, what constitutes fair compensation. This case is structurally different. The agreed commission rate applied to the actual reinsurance premium produces a precise number. Once the bordereaux are produced, the calculation is mechanical rather than evaluative. This removes an entire category of outcome uncertainty. There is no valuation range, no expert opinion spectrum, no speculative counterfactual. The court’s task is not to determine what amount is fair; it is to determine what amount is contractually owed.
PCAOB AS 2401 (Consideration of Fraud in a Financial Statement Audit) is issued by the Public Company Accounting Oversight Board. ISA 240 (The Auditor’s Responsibilities Relating to Fraud in an Audit of Financial Statements) is issued by the International Auditing and Assurance Standards Board (IAASB). Neither standard is a rule of the NSW Supreme Court.
They are, however, directly relevant here. Both are the auditing profession’s established benchmarks for identifying and evaluating fraud risk indicators in a documented financial record — precisely the assessment at issue in this proceeding. In NSW Supreme Court litigation where fraud, accounting misstatement, or concealment is alleged, forensic accounting experts routinely apply these standards when assessing whether a pattern of conduct amounts to fraud, deliberate misstatement, or failure of professional duty. Courts accept that analysis as a disciplined, principled framework for weighing the evidentiary record — not as court rules, but as the recognised methodology of the discipline the evidence comes from.
The analytical framework in this model is built on those same standards because the factual pattern — one-directional error over 17 years, eight mutually contradictory explanations, systematic departure from the agreed methodology, and admitted data withholding — is precisely the category of conduct both standards were designed to identify and characterise.
The model distinguishes between three distinct claims, each with its own factual foundation, legal structure, and probability assessment. These are independent pathways to recovery — any one of which produces a significant award. All three must fail simultaneously for nil recovery. At base values, the probability of simultaneous failure is approximately 0.006%.
| Claim | Probability Range | Nature | Primary Driver |
|---|---|---|---|
| A — Estimates vs Actuals EA + CA, all territories, from 1 July 2005 |
93%–97% | Data-driven | D3.70 admission + CC-13 pivot + 17-year systematic estimation without contractual authority |
| B — Korea Rate Reduction Korea EA stream, 1.875% → 0.375% unauthorised |
95%–98% | Documentary | No executed amendment; Double Mod Lock; five abandoned justifications; 2003 consent precedent; CC-74 Aegon admission |
| C — Deed Default (Factual) TLIC guarantee, demand 25 Nov 2025, 4+ months default |
97%–99% | Documentary | Wardley binding authority; demand served; no compliance; no Deed-specific defence; 4+ months default |
Each input maps to a discrete legal issue the court must decide. The default value is the calibrated base probability for that issue, derived from the five structural factors above and the specific evidentiary record for that issue.
The nine probability inputs were not chosen to optimise the output. They were chosen because they are the issues the court must decide. This correspondence was independently confirmed by the NSW Court of Appeal panel at the NSW Bar Association Advanced Legal Writing Seminar on 20 November 2020.
“After you’ve done all the preparation of the case, have you actually sat down and said: what are the ultimate propositions of fact or law that I am contending for, in summary form, in propositional form, which if the court accepts I will win the case? A huge amount of work is required in producing what in the end will be only half a page — but for judges of any court to get that sort of material would be very helpful in preparing for the hearing and then ultimately deciding the case.”
Each P input is one of those ultimate propositions. If the court accepts P1 (Korea rate void), Harrison wins on Claim B. If it accepts P2 and P5 (Deed valid + demand valid), Harrison wins on Claim C. The model is structured by the court’s own decision logic — not by the plaintiff’s preferred framing.
The thirteen issues the court must decide (per S10-MASTER Part A) map directly onto the nine probability inputs. The model architecture follows the court’s decision path.
| Input | Court Issue | What the Court Decides |
|---|---|---|
| P1 | Issues 5, 6, 7 — Korea Rate | Was the reduction to 0.375% contractually authorised? Is it void? |
| P2 | Issue 8 — Deed Nature | Is the Deed a primary indemnity (immediate, unconditional) or accessory guarantee? |
| P3 | Issues 1, 2, 3 — EA Methodology | Was estimates substitution from 1 July 2005 contractually authorised? |
| P4 | Limitation — s.55 | Does fraudulent concealment preserve the full 20-year historical quantum? |
| P5 | Issues 9, 10, 11 — Deed Default | Was demand valid? Did TLIC comply? Does TLIC have any Deed-specific defence? |
| P6 | Issues 1–3 (CA stream) | Same methodology breach — does it extend to the Consulting Agreement stream? |
| P7 | Issue 7 (Korea quantum) | If rate is void, does quantum follow from GWP × 1.875% methodology? |
| P8 | Route C — Limitation | Does 2025 fresh fraud / s.249K operate as an independent limitation route? |
| P9 | Costs Order | Does defendant conduct warrant an indemnity costs order? |
The Deed claim (Claim C) produces judgment for $100,743,642 independently of Claims A and B. The court does not need to reach Claims A or B if it resolves Claim C first. Korea (Claim B) is similarly independent. The OR-gate in the model is not a design choice — it directly mirrors the court’s own modular decision structure: three legally independent causes of action, each independently sufficient, each triggering recovery without the others. Andrew Bell (President, NSW Court of Appeal, 20 November 2020) confirmed courts will “trim, confine, order particulars, or require amendment rather than destroy a viable commercial claim wholesale” — meaning each stream survives adverse rulings on the others.
When a defendant withholds data that determines the answer, two rules operate automatically. They are incorporated in the model because the court is required to apply them — not because the model sought a higher number.
Where a party fails to produce documents within their control that would resolve a disputed issue, the court must draw the inference that withheld evidence would not assist that party. This is a mandatory obligation. Gleeson SC confirmed: “There are some principles of law which the court must comply with, such as where appropriate Jones v Dunkel.”
Full explanation → Foundations pageUncertainty created by a defendant’s own conduct does not defeat a damages claim. The court applies best available evidence. A defendant cannot create the gap in proof and then rely on that gap to resist liability. Applied throughout NSW Commercial List practice.
Full explanation → Foundations pageAegon denied the data existed. Aegon admitted it exists. Aegon has still refused to produce it. Both rules are activated simultaneously. P3 and P4 incorporate these mandatory judicial responses — they are not uplifts. They reflect what the court will do.
P1 is the highest-probability input in the model for a specific reason: it is a pure contract question with no premium data dependency. EA Clause 20 requires a signed written amendment by both parties to change any commission rate. The Double Modification Lock requires Harrison’s express consent. No such document has been produced. Aegon has offered five successive justifications, each abandoned. CC-74 (October 2024) is Aegon’s own admission that the Marketing Agreement provides no unilateral rate-change authority. The 2003 Korea consent precedent is the contractual standard.
The factual dispute reduces to a single document question: where is the executed written amendment? If none exists — and none has been produced in four years of correspondence — the rate reduction is void and the 1.875% rate applies throughout.
P2 captures the probability that the Deed is characterised as a primary indemnity — imposing immediate and unconditional liability on TLIC independently of Claims A and B. The five departure pathways (Deed formality; demand defect; s.16(1)(b) inapplicability; s.63 extinguishment; Ankar variation discharge) are each independently closed. Wardley Australia (1992) 175 CLR 514 is binding High Court authority on the accrual structure. Clause 2.1 is a primary obligation — the accessory characterisation faces five independent grounds of failure under binding authority.
The claim accrued 25 November 2025. No payment has been made, no injunction sought, no Deed-specific defence advanced. The limitation argument faces the additional hurdle that the clock was reset by Aegon’s own General Manager’s written admission. The hard cap at 92% reflects conservative discounting for the procedural scale of a $100M+ summary judgment application.
CC-13 (1 July 2005) is the controlling anchor: Aegon’s own internal document confirms that the correct methodology was applied in the Ingenium system from July 2005 but overridden in client-facing commission reports. The “Comm to KH” column proved the correct calculation ran in the system for 18 years while manual reports paid less. D3.70 (2 August 2024) is the direct admission: actual premium data existed and was deliberately not provided to the commission calculation team.
The $3,319,108 corrective payment in February 2024 (without deed of release, without reservation) is a partial admission of liability under s.54. The 7% conservative downside reflects the possibility of quantum bifurcation — liability found with damages deferred pending bordereaux production, affecting timing but not the probability of ultimate recovery.
Section 55 postponement requires establishing that Aegon engaged in fraudulent concealment that prevented Harrison from discovering the claim. Five independent pillars support this: progressive retraction of explanations; NDA weaponisation; D3.70 deliberate suppression; systematic underpayment over 17 years; and the eight-position contradiction pattern demonstrating consciousness of wrongdoing. The Briginshaw standard (elevated civil standard for serious conduct findings) applies, and the documentary record satisfies it.
PCAOB AS 2401 and ISA 240 — auditing standards applied by forensic experts in proceedings of this kind — treat the pattern of eight mutually exclusive explanations as satisfying the non-random error threshold for deliberate concealment. The hard cap at 82% reflects judicial conservatism on limitation findings and the availability of Route A as an alternative.
P5 captures the probability that Route A (Deed accrual on demand, 12-year specialty period under s.16 Limitation Act) is upheld as the controlling limitation framework for the guarantee claim. The demand was served 25 November 2025; the 12-year period runs to December 2037. Wardley Australia (1992) 175 CLR 514 and Sunbird Plaza (1988) 166 CLR 245 support demand-accrual for guarantee instruments of this type.
The three-limb s.63 extinguishment rebuttal forecloses the argument that the guarantee fails as accessory to limitation-barred primary claims: independent demand accrual (Limb 1); Clause 2.1 as primary indemnity (Limb 2); and s.55/s.54 sequencing defeating extinguishment (Limb 3). Any one limb is sufficient.
P6 is set 1% below P3 because the Consulting Agreement stream, while resting on the same estimates-vs-actuals methodology breach, has four CA-specific admitted breaches documented separately from the EA breaches. The same CC-13 pivot date and D3.70 admission apply to both streams, and the same corrective payment implicates both. CA Bonus Commission principal: $16,730,644 (total $31,286,877 with interest).
The Allens counterclaim of approximately $2.4M represents approximately 3% of the net CA claim and is rebuttable on six independent grounds, including the absence of any contractual authority for overpayment recovery against a methodology that was itself contractually wrong.
P7 is the most conservative input in the model — deliberately so. It captures the probability that the court will extend the methodology breach across business cohorts not specifically identified in the existing commission records. This is an inferential claim rather than a directly documented one, and the conservative default reflects the court’s traditional caution about inferential damages quantification even where the defendant’s own conduct caused the evidentiary gap.
Jones v Dunkel provides the adverse inference platform: Aegon holds the cohort data and has not produced it. Chaplin v Hicks [1911] 2 KB 786 supports recovery for loss of chance where the defendant’s wrongdoing made precise quantification impossible.
P8 captures Route C: fresh fraud arising from Aegon’s 2021–2025 post-discovery conduct, including the Allens $2.4M counterclaim filed in October 2025. The counterclaim asserts an overpayment entitlement against a party whose underpayment claim is documented in the defendant’s own records. Six documented fraudulent statements in the 2021–2025 period are relevant to the s.249K threshold.
P8 is correctly wired as an OR gate in the limitation layer: it does not need to succeed for the overall claim to succeed, but its success provides an independent limitation route that accrued no earlier than October 2025 — entirely within any standard limitation period.
P9 is architecturally isolated from the model’s merits simulation to prevent double-counting. It does not affect the Expected Value or win probability calculations. It affects the costs-adjusted exposure KPI only — capturing the probability that the court awards indemnity costs against Aegon on the basis of its conduct in the proceedings.
Five conduct categories support an indemnity costs order: deliberate data withholding; eight successive false explanations over 48 months; D3.70 admission of deliberate suppression; the weaponised NDA; and the $2.4M counterclaim as a fresh fraudulent instrument. NSW research range for indemnity costs on conduct grounds: 65–80%. The Favourable cap at 88% reflects a scenario where the court finds the full concealment pattern proven to the Briginshaw standard.
Default values change only when a specific new fact or legal development makes the current calibration inaccurate. Moving to Conservative reflects a genuinely adverse development. Moving to Favourable reflects a confirmed plaintiff-positive development beyond the Base assumption. Adjusting defaults without a specific anchor is scenario framing, not model analysis, and should be labelled as such.
The AIOOJ model’s value to Corrs and counsel is entirely dependent on the integrity of its inputs. A model that inflates to produce comfortable outputs is worse than no model at all — it misdirects strategy. The Conservative values are the defendant’s honest best case. The Base values are the forensically calibrated position. The Favourable values are the structural ceilings. Any input outside these ranges requires a documented legal or evidentiary reason, recorded in S11-02 before the model is re-run.
This page is the web presentation layer. The analytical foundation is held in Series 11 of the litigation bundle (access restricted to allowlist users):