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⚖️ Anti-concurrent causation clause is a policy provision found in many property and casualty insurance contracts that bars coverage when a loss results from a combination of covered and excluded perils occurring simultaneously or in sequence. Under this clause, even if one cause of the loss would normally trigger coverage, the presence of an excluded cause — acting concurrently or in any sequence with the covered cause — allows the insurer to deny the entire claim. The clause is most frequently encountered in homeowners and commercial property policies, particularly in connection with flood and earth movement exclusions.
🔧 In practice, the clause typically appears in the exclusions section and is introduced by language such as "We do not cover loss regardless of any other cause or event that contributes concurrently or in any sequence to the loss." Consider a hurricane that causes both wind damage (covered) and storm surge flooding (excluded): an anti-concurrent causation clause empowers the insurer to deny the claim in its entirety because the excluded peril contributed to the outcome, even though wind alone would have been covered. Adjusters must carefully apply causation analysis, and disputes frequently lead to litigation where courts examine whether the excluded and covered causes are truly inseparable or whether losses can be apportioned.
🏛️ These clauses remain among the most litigated provisions in insurance law, and their enforceability varies significantly by jurisdiction. Some states have upheld them as valid exercises of an insurer's right to define the scope of coverage, while others — notably following large catastrophe events like Hurricane Katrina — have narrowed their application or imposed requirements for the insurer to prove the excluded peril was the dominant cause. Policyholders, brokers, and risk managers should understand these clauses before a loss occurs, as they fundamentally shape what is and is not recoverable under a policy, particularly in regions prone to complex, multi-peril events.
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