Concurrent Causation in Indian Claims: Marine, Property, and Engineering Policy Disputes

Indian insurance contracts indemnify losses proximately caused by insured perils. The phrase carries over 150 years of English and Indian jurisprudence, starting with Pawsey v. Scottish Union and National Insurance Co (1907), where Lord Bacon articulated the rule as causa proxima, non remota, spectatur, the nearest cause, not the remote, is considered. Indian courts adopted the doctrine wholesale and have applied it across marine, fire, property, engineering, and liability insurance for over a century.

The operative principle is deceptively simple. When a loss has a single cause, and that cause is an insured peril, the claim succeeds. When a loss has a single cause that is excluded, the claim fails. The doctrine's complexity appears when multiple causes contribute to the loss, and Indian courts have developed several tests to resolve the ambiguity.

The dominant cause test: where multiple causes act in sequence, the proximate cause is the dominant, efficient, or operative cause that set the chain of events in motion and produced the loss in the ordinary course of nature. A lightning strike ignites a fire that damages a building, the lightning is the proximate cause because it initiated the causal chain, the fire is a natural and direct consequence.

The last cause test, largely rejected by Indian courts but occasionally invoked in older decisions, treats the temporally latest cause as proximate. The Supreme Court and NCDRC have consistently rejected this in favour of the dominant cause analysis.

The efficiency test: where multiple causes act concurrently rather than sequentially, the proximate cause is the cause that was most efficient in producing the loss, assessed on the specific facts rather than by formula. This test is frequently applied in complex concurrent causation cases.

The practical question for Indian policyholders: which test applies, and how do insurers and surveyors reach proximate cause conclusions that may determine recovery of crores?

Indian courts have built a substantial body of proximate cause jurisprudence that insurers and policyholders can cite in claim disputes.

The Supreme Court in General Assurance Society Ltd v. Chandumull Jain (1966) established foundational principles of insurance contract interpretation including proximate cause analysis. The Court held that insurance contracts must be interpreted to give effect to the parties' commercial purpose, with ambiguities resolved against the insurer, and that proximate cause requires identification of the dominant, effective cause of the loss rather than mechanical application of sequential or temporal rules.

In Oriental Insurance Co. Ltd. V. Sony Cheriyan (1999), the Supreme Court addressed a case involving combined vehicle accident and subsequent fire damage, holding that the initial collision was the proximate cause of all resulting damage, including damage from the subsequent fire, because the fire was the natural and foreseeable consequence of the accident.

New India Assurance Co. Ltd v. Zuari Industries Ltd (2009) addressed machinery breakdown where multiple contributing factors (operational error, material defect, inadequate maintenance) combined to cause failure. The Court applied a detailed concurrent causation analysis and held that where the covered peril materially contributed to the loss, and the contribution of excluded factors was incidental rather than dominant, recovery was permitted.

Various NCDRC decisions have applied proximate cause in marine cargo contexts. In Tata AIG General Insurance Co. Ltd v. Shagun Polymers (2017), the commission addressed cargo damage caused by both improper packaging and shipping vibration, holding that where packaging was commercially reasonable and the insured peril (transit) was the dominant cause, the claim succeeded notwithstanding contribution from packaging inadequacy.

High Court jurisprudence has further refined the doctrine. The Delhi High Court in Iffco Tokio General Insurance v. Permanent Magnets Ltd (2013) addressed property damage from flooding where inadequate drainage at the premises contributed to water ingress. The court held that the monsoon flooding was the proximate cause notwithstanding the drainage inadequacy, because the flooding was an insured peril and the drainage issue was a background condition rather than an operative cause.

The pattern: Indian courts favour policyholder-friendly proximate cause analysis where the insured peril materially contributed to the loss, and they resist insurer attempts to defeat claims by characterising excluded peripheral factors as dominant causes.

Marine cargo claims are particularly rich in concurrent causation disputes because the perils of the sea, the conduct of the carrier, and the condition of the vessel frequently interact.

The unseaworthiness exclusion in Institute Cargo Clauses A, used extensively in Indian marine cargo placements, excludes loss caused by unseaworthiness of the carrying vessel where the assured or their servants were privy to such unseaworthiness. The exclusion has been narrowly construed by Indian courts. Where the cargo owner was unaware of the vessel's condition and the unseaworthiness became manifest only through an insured peril (heavy weather, collision, stranding), the claim typically succeeds.

Negligent stowage by the carrier is a common concurrent cause. Under ICC A, loss caused by crew negligence is not excluded unless it also involves wilful misconduct. Where improper stowage causes shifting of cargo in heavy weather, the heavy weather is typically the proximate cause, with negligence as a contributing factor. Indian courts have followed this reading consistently.

Inherent vice, the exclusion for loss arising from the nature of the goods themselves, is another frequent battleground. Perishable cargo deteriorating during a delayed voyage raises the question: is the proximate cause the insured peril that caused the delay (engine breakdown, port congestion after a strike) or the inherent tendency of the cargo to deteriorate? The NCDRC has generally held that where the delay was caused by an insured peril and the deterioration was the natural consequence, the claim succeeds, with the inherent vice exclusion operating only where deterioration would have occurred irrespective of the insured peril.

The 2021 Mumbai port congestion following COVID-19 disruptions produced a wave of cargo claims involving delayed arrival, deterioration of refrigerated cargo, and disputes over whether the delay was an insured peril or an excluded event. Settlements varied based on specific policy wording and the documented cause of each consignment's specific delay.

War and strike risks require separate cover under Indian marine practice, typically added through Institute War Clauses (Cargo) and Institute Strikes Clauses (Cargo). Where a loss involves both an insured peril and a war or strike cause, the proximate cause analysis determines which policy responds. The 2022 Russia-Ukraine disruption produced multiple such claims for Indian cargo in transit through affected routes.

Property insurance concurrent causation disputes in India cluster around three recurring fact patterns: flood combined with inadequate maintenance, fire combined with excluded causes such as arson, and structural collapse combined with design or construction defects.

Flood plus inadequate maintenance: a warehouse suffers water damage during monsoon flooding. The insurer argues that poor drainage maintenance and inadequate plinth elevation were proximate causes, not the flooding itself. Indian courts have generally held that the flooding is the proximate cause where flooding was the triggering event, treating maintenance shortcomings as background conditions unless they rise to the level of a specific exclusion like wear and tear or gradual deterioration.

Fire plus arson investigation: a fire loss is reported, and the insurer's investigation suggests arson or attempted insurance fraud. Where arson is an excluded peril (typical in standard fire policies) and the insurer can prove deliberate ignition by the insured or with insured's consent, the claim fails. Where arson by a third party occurred and the insured was not complicit, Indian courts have held the fire loss remains covered. The Bombay High Court in several decisions has distinguished between fraudulent arson by the insured (fatal to the claim) and criminal arson by outsiders (not fatal to the claim).

Structural collapse plus construction defect: a building collapse causes property damage and consequential business interruption loss. The insurer invokes a latent defect or inadequate construction exclusion. Indian courts apply the proximate cause analysis: if the trigger was an insured peril (earthquake, flood, explosion) and the construction defect merely amplified the damage, the claim succeeds for the insured portion. If the construction defect itself caused the collapse without any insured-peril trigger, the claim fails.

Anti-concurrent causation clauses have begun appearing in Indian property wordings, particularly in programmes placed with international reinsurance support. These clauses provide that if a loss is caused concurrently by an insured peril and an excluded peril, the exclusion governs and the claim fails irrespective of the contribution of the insured peril. US courts have enforced such clauses in hurricane contexts (wind plus flood, where flood was excluded). Indian courts have not definitively tested anti-concurrent causation clauses, but the contra proferentem principle and the traditional proximate cause analysis suggest Indian courts would interpret them narrowly.

Policyholders should read their wordings for anti-concurrent causation language carefully. Where present, negotiate removal or narrow drafting at renewal. Where the clause remains, structure the claim evidence to demonstrate that the insured peril was the sole or dominant cause, with any excluded factors being truly minor contributors.

Engineering insurance, contractors all risks (CAR), and erection all risks (EAR) policies present distinctive concurrent causation issues because the insured work is by nature a controlled environment where multiple parties (designers, contractors, subcontractors, material suppliers) contribute to the risk.

The LEG and DE series of design exclusion clauses (LEG 1, LEG 2, LEG 3 from the London Engineering Group, and DE1 through DE5 in Indian market parlance) calibrate the extent to which design defect losses are excluded. DE1 excludes all loss arising from defective design. DE3 covers the cost of rectifying the defective design portion plus resulting damage to other parts of the work. DE5 covers the resulting damage only, excluding the cost of rectifying the defective design itself. The distinction matters enormously when a design defect causes collateral damage.

Example: a cement plant under erection suffers structural failure in a boiler mounting due to inadequate design of a support bracket. The failure causes damage to the boiler, adjacent piping, and structural steel. Under DE5 cover, the cost of redesigning and rebuilding the bracket is excluded, but the consequential damage to boiler, piping, and steel is covered. Under DE3 cover, the bracket cost is also covered. Under DE1 cover, nothing is covered because the defective design is the proximate cause.

Workmanship defects overlap with design defects in practice. Where both contribute to a failure, the concurrent causation analysis determines whether the design exclusion applies. If the workmanship error was the dominant cause and the design was adequate as drawn, the claim succeeds under the insured workmanship peril. If the design was inadequate and workmanship merely failed to compensate for the design flaw, the design exclusion may apply.

The erection phase versus operational phase distinction is another concurrent causation battleground. EAR policies cover losses during erection, property policies cover operational phase losses, and the transition creates a gap-filling challenge. Where a defect manifests late in commissioning and the loss occurs during initial operation, which policy responds? Indian insurers have developed testing and commissioning extensions and maintenance period cover to address this, but policyholders often find themselves caught between EAR and property coverage with both insurers denying liability.

Major infrastructure projects in India (power plants, refineries, industrial corridors) have faced multiple high-value claim disputes involving these transitions. The 2019 to 2023 period saw several power project disputes where boiler or turbine failures during early operation were contested between EAR and property insurers, with settlements often achieved through broker-led mediation rather than litigation.

Proximate cause disputes turn on evidence, and how that evidence is assembled from the moment of loss shapes the eventual outcome.

Immediate post-loss evidence: photograph the loss site from multiple angles capturing the full chain of damage. Document the sequence of events through witness statements taken while memories are fresh. Preserve physical evidence including failed components, residues, damaged materials, and environmental indicators. For fire losses, secure fire brigade reports. For marine cargo losses, secure the bill of lading, mate's receipt, survey reports at port of discharge, and any stevedore damage reports. For engineering losses, secure all design drawings, inspection records, and test reports.

Expert evidence is often decisive. Engage independent experts early, do not wait for the insurer's surveyor to complete their report before lining up rebuttal expertise. Fire investigators, metallurgists, structural engineers, marine surveyors, and chartered accountants for BI quantum all play critical roles in concurrent causation disputes. The cost of early expert engagement (typically 5 to 25 lakh rupees depending on complexity) is negligible compared to the recovery at stake in major claims.

Documentary chains: proximate cause arguments are built on documentary evidence. Maintenance records (to rebut wear and tear allegations), design approvals and sign-offs (to rebut design defect allegations), environmental monitoring records (to demonstrate conditions at the time of loss), operator training logs (to rebut operational error allegations). A well-maintained documentary system is one of the best defences against insurer attempts to shift proximate cause to excluded factors.

Surveyor engagement: Indian insurers appoint IRDAI-licensed surveyors under Section 64-UM of the Insurance Act. The surveyor's report is the primary evidentiary document for most claims. Do not passively wait for the surveyor's findings, engage actively. Provide documentation proactively, ensure the surveyor understands the technical context, and respond promptly to any preliminary observations that suggest a drift toward excluded causes.

Expert rejoinder: where the insurer's surveyor reaches proximate cause conclusions unfavourable to the policyholder, commission an independent expert rejoinder addressing the specific findings. A well-argued rejoinder can shift settlement positions substantially, particularly when it identifies factual errors, methodological flaws, or selective evidence treatment in the surveyor's report.

The best time to resolve a concurrent causation dispute is before it arises, through careful policy wording selection at placement and renewal.

Exclusion scope review: read every exclusion in your policy and assess its concurrent causation implications. Standard exclusions like wear and tear, inherent vice, gradual deterioration, and design defect all have potential concurrent causation applications that can defeat otherwise valid claims. Where an exclusion is drafted broadly, negotiate narrower wording that limits its scope to losses where the excluded factor is the sole or dominant cause rather than any contributing cause.

Anti-concurrent causation clauses: resist their inclusion. These clauses fundamentally shift the balance by applying exclusions irrespective of the insured peril's contribution. Where present in wordings proposed at renewal, insist on their removal or replacement with traditional proximate cause language.

Specific coverage extensions: where a particular concurrent causation risk is identified, negotiate explicit coverage. For example, a flood extension can be drafted to cover losses where flood contributes to the loss, even if excluded factors like drainage inadequacy also contribute. A design-defect extension under engineering policies can be drafted to cover consequential damage even where the design defect is the initiating cause.

Claims handling clauses: negotiate wording that requires the insurer to apply proximate cause analysis to concurrent causation scenarios, rather than defaulting to exclusion application. Some policies now include express language requiring proximate cause determination by a mutually agreed expert, which can prevent insurer-driven causation characterisations.

Broker advocacy: a capable broker understands the concurrent causation terrain and pushes for wordings that protect the policyholder. At renewal, request a concurrent causation analysis of your current wording, including identification of any anti-concurrent causation language, review of exclusion scope, and recommendations for wording improvements. AI-assisted policy analysis, a capability Sarvada's platform provides, can scan wordings for adverse concurrent causation language and benchmark against best-in-market alternatives.

Ongoing wording improvement: do not treat the renewal wording as static. The Indian market evolves year to year as insurers incorporate new exclusions, reinsurers push stricter terms, and court rulings reshape the legal framework. A programme that was adequately protected five years ago may have drifted into adverse territory through successive renewal wording changes. Regular wording audits catch these drift issues before they become claim problems.