The most expensive sentence in New Zealand commercial fleet insurance reads: "following our investigation we are unable to indemnify you in respect of this claim". It arrives, on average, six to eight weeks after a serious incident — long after the operator has paid for hire-replacement vehicles, downtime costs and (where applicable) third-party property settlements on the assumption the policy would respond.

The repudiation letter is not random. The phrases that appear in it are drawn from a small vocabulary of statutory and contractual grounds, and they appear in the same patterns across the industry. The Contracts of Insurance Act 2024 (CoIA), which came into effect in stages from 2024 and replaces the Insurance Law Reform Act 1977, the Insurance Law Reform Act 1985, the Marine Insurance Act 1908 and the Life Insurance Act 1908, modernised the framework but the underlying disputes still cluster around the same four ideas. This article walks through them, what proof the insurer relies on, and what proof you can put forward that they cannot refuse.

The legal frame: why the insurer is asking these questions at all

For commercial buyers — fleets, businesses, anyone who is not a natural-person consumer — the Contracts of Insurance Act 2024 imposes a duty of fair presentation under sections 17-22. It replaced the older common-law duty of utmost good faith with a more workable regime: you must disclose every matter you know, or a reasonable person in your position would know, to be a matter relevant to the insurer's decision whether to insure on what terms.

The Act constrains the insurer's right to refuse a claim. Where the insurer can establish a "qualifying breach" of the duty — a deliberate or reckless misrepresentation, or a careless misrepresentation that affected the terms — its remedies range from price adjustment to contract avoidance. The CoIA explicitly addresses the proportionality of the remedy to the breach, and clarifies that breach of an unrelated warranty no longer voids the entire policy.

The Insurance and Financial Services Ombudsman (IFSO) provides external dispute resolution for retail and small-business policies up to specified monetary limits. The Financial Markets Authority regulates the conduct of financial services providers, including insurance brokers and intermediaries.

The four phrases below are how those statutory mechanisms appear in practice.

Phrase 1: "Failure of the duty of fair presentation"

The most common opener. The loss adjuster will compare the answers you gave at renewal — number of vehicles, garaging address, business use, named drivers, claims history, any policy on driver checks, any policy on maintenance — against what they have learned during the investigation.

The mismatch is rarely a lie. It is more usually a small piece of practice that drifted between renewals. You said at renewal that "all drivers undergo annual licence checks". Twenty months later, three contractor drivers have rotated in and out without checks. The loss adjuster establishes this and asserts a section 17 CoIA breach.

What proof the insurer relies on: HR records, payroll for new starters in the policy year, statements from drivers, your own internal emails. What proof you can put forward: time-stamped, immutable records of every licence check carried out, indexed by driver, retained at the moment of each check. If you have these, the insurer's case collapses on this point. If you do not, the case stands.

Phrase 2: "Material non-disclosure"

A specific subset of phrase 1, used where the gap is more substantive — undisclosed claims history, undisclosed regulatory action, undisclosed driver convictions, undisclosed depot moves, undisclosed business use. This is the phrase that appears most in fleet claims where a driver has acquired demerits, suspensions or convictions since the last renewal and the operator did not catch them.

The proof the insurer relies on is the NZTA driver record, accessible to the operator (with the driver's consent) through the licence-check process. The proof you can put forward is your routine of driver checks, with timestamps and verification, and a record of how you respond to changes — particularly endorsement notifications, demerit accumulations and disqualifications.

IFSO publishes case notes on insurance disputes. Its case patterns under the predecessor regime, and increasingly under CoIA, establish that where the insured can show a contemporaneous, verifiable system, IFSO regularly finds against the insurer's assertion of non-disclosure.

Phrase 3: "Increase in risk during the policy period"

Used where the operation drifted in some material way after renewal. Common drifts: adding vehicles without notification, changing depot location, taking on a new contract that introduces new risks (dangerous goods, overnight remote-area parking, longer interisland routes), adding drivers under 25, adding drivers with prior convictions.

The legal foundation: most fleet policies include a duty-to-notify clause that mirrors CoIA's ongoing-disclosure expectations. Breach of the clause is a contractual breach; the CoIA proportionality framework limits the insurer's ability to deny indemnity to the extent the breach actually affected the loss. An insurer cannot deny indemnity for a brake-failure collision because you added a driver mid-year without notification — those events are unconnected. But where the breach actually contributed to the loss, the insurer can.

The proof the insurer relies on: vehicle telematics, ANPR logs (NZTA can provide aggregated data under specified circumstances), your own marketing announcing the new contract, any correspondence with brokers about adding vehicles. The proof you can put forward: dated, time-stamped notifications to the broker, including any vehicles added mid-year and any business-use changes, with read-receipts where possible.

Phrase 4: "Breach of warranty as to vehicle condition"

The phrase most directly under your control as a fleet operator, and the phrase most commonly invoked when a serious mechanical issue contributes to the loss. Fleet policies almost always include a warranty that the vehicle is "maintained in accordance with manufacturer's recommendations" or words to similar effect. Some policies are stricter and refer to specific service intervals or a documented PMI cycle.

The CoIA changed the position on warranties. Under the previous regime, technical breach of warranty could void cover. The CoIA introduces a proportionality requirement: the insurer can only deny the claim where the breach increased the risk of the loss that actually occurred. Breach of an unrelated warranty no longer voids the entire policy.

But: the insurer has the right to investigate the maintenance regime, and they will. The investigator will ask for PMI records, current CoF or WoF certificates, all defect reports for the vehicle in the policy year, all repair invoices. They will ask for the records to demonstrate when each entry was made.

This is where almost every dispute turns. The operator who can produce a tamper-evident record of every inspection, every defect, every repair, with photos carrying their original EXIF and individual hashes, with an OTP-verified mechanic identity, with server-side timestamps the operator cannot edit — that operator wins this point. The operator who produces a spreadsheet with a "last modified" date of last Tuesday, two days before the loss adjuster called, loses this point regardless of the underlying truth of the record.

The ACC carve-out, and what is left for the insurer to dispute

New Zealand's no-fault accident compensation scheme, administered by the Accident Compensation Corporation under the Accident Compensation Act 2001, removes the right of an injured person (or their dependants in the case of fatal injury) to bring a personal-injury civil claim. This significantly changes the dispute landscape compared with the UK or Australia.

What is left for the commercial fleet insurer to dispute, and where the four phrases above apply:

  • Property damage to the operator's own vehicle.
  • Property damage to third parties' vehicles and other property.
  • Consequential and economic loss claims (downtime, hire replacement, lost contracts).
  • Defence costs in any regulatory or coronial proceeding the operator becomes involved in.
  • Indemnity for any civil claim that falls outside the personal-injury bar (e.g. economic-loss claims by another business affected by the incident).

The fact that ACC removes the personal-injury civil claim does not make the maintenance record less important. If anything, it concentrates the insurer's attention on the property-damage and economic-loss claim and on any contribution-from-warranty-breach defence — making the four phrases more rather than less likely to appear in the repudiation letter.

The Fair Insurance Code

The Insurance Council of New Zealand publishes the Fair Insurance Code, which subscribing insurers commit to in their dealings with policyholders. The Code includes timelines for claims handling, requirements for plain-language communications and obligations around vulnerable customers. IFSO takes Code compliance into account in its determinations.

The Code does not create new statutory rights, but it does create reputational and regulatory exposure for insurers who depart from it. An insurer who refuses a claim in the manner described above without first conducting a Code-compliant investigation faces a stronger IFSO case from the policyholder.

What evidence is "incontestable" in practice

Loss adjusters and fraud investigators in New Zealand use a small toolkit of techniques to assess record reliability. Knowing what they look for explains why some records survive scrutiny and others do not.

  1. File creation and modification timestamps. They will examine document metadata, including in-document revision histories and operating-system file metadata. Mutable formats (Excel, Word, PDF) fail this test routinely.
  2. Photo EXIF analysis. Photos accompanying a maintenance record carry GPS coordinates, capture timestamp, camera fingerprint and device identity. A photo of a brake disc inspection on 12 October 2025, where the EXIF shows the photo was actually taken on 14 January 2026 in a different town, ends the dispute.
  3. Cross-reference to telematics. If your vehicle has telematics, the loss adjuster will pull the data. The vehicle's actual mileage and routing history will be cross-referenced against your maintenance records.
  4. Hash-chain verification. Where the operator runs a tamper-evident chain-of-custody system, the loss adjuster can re-compute the hashes themselves and verify continuity. If the chain holds, the record is incontestable.

The fourth technique has changed the dispute landscape post-2020. A small number of major fleet insurers in New Zealand now actively reward operators who can demonstrate cryptographic provenance, with discounted premiums or accelerated claim resolution. The pattern is recent and not yet universal, but it is the direction of travel.

What to do this month

  1. Pull your last renewal proposal. Read every answer. Identify any that may have drifted since.
  2. List every driver active in the policy year. For each, identify the date of the last licence check. Where a check is missing or older than 12 months, schedule one this week.
  3. List every vehicle added or removed since renewal. Confirm in writing to your broker that they were notified.
  4. Pull every PMI record and CoF or WoF certificate for the policy year. Identify any vehicle without a contemporaneous PMI in the last 8 weeks.
  5. For every defect reported in the last 12 months: confirm the chain — reported, acknowledged, fixed, verified — exists for each one.
  6. Where the records sit in mutable formats, plan a 90-day migration to a tamper-evident system. The cost is small. The protection is large.

Sources & further reading

Related Mekavo articles: Coronial inquest — what your NZ fleet maintenance record must prove, NZTA roadside check — the 12-minute window, From "driver reported it" to "fix verified" — the workflow gap.

Why we care

Mekavo Fleet records every inspection, every defect, every repair as a sealed entry in a hash-chained ledger. Photos carry their original EXIF and individual SHA-256 hashes. Mechanic identities are OTP-verified. Driver identities are OTP-verified. Server-side timestamps are not editable. When the loss adjuster's letter arrives, you do not assemble a defence — you produce a record they can re-verify themselves. The four phrases stop being terminal.