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⚠️ '''Known circumstance exclusion''' is a policy provision — most commonly found in [[Definition:Claims-made policy | claims-made]] [[Definition:Liability insurance | liability]] and [[Definition:Professional indemnity insurance | professional indemnity]] coverages — that excludes from coverage any claim arising from facts, situations, or incidents the insured was already aware of before the [[Definition:Policy inception | policy inception]] date. The clause prevents an applicant from purchasing insurance after becoming aware of a problem likely to generate a claim, which would undermine the fundamental principle of [[Definition:Fortuity | fortuity]] that insurance depends on. It functions as a critical safeguard for [[Definition:Underwriter | underwriters]], particularly in lines such as [[Definition:Directors and officers insurance (D&O) | directors and officers]], [[Definition:Errors and omissions insurance (E&O) | errors and omissions]], and [[Definition:Cyber insurance | cyber]] insurance where the insured often has asymmetric knowledge about latent exposures.

🔎 When a [[Definition:Policy application | policy application]] asks whether the applicant is aware of any circumstances that could reasonably give rise to a claim, the answer triggers this exclusion's scope. If the insured discloses a known circumstance, the [[Definition:Insurer | insurer]] may still offer coverage but will specifically exclude that matter via endorsement. If the insured fails to disclose and later submits a claim traceable to a pre-existing circumstance, the insurer can deny the claim — and in some jurisdictions, [[Definition:Void ab initio | void the policy]] entirely for [[Definition:Material misrepresentation | material misrepresentation]]. Courts have litigated extensively over what constitutes "knowledge" and how specific the awareness must be, making precise policy language and thorough [[Definition:Proposal form | proposal form]] questioning essential.

📌 For brokers advising clients during renewals or program changes, this exclusion demands careful attention. A gap in continuous [[Definition:Claims-made policy | claims-made]] coverage — or a switch between carriers — can leave known circumstances in a no-man's-land where neither the old nor the new policy responds. Skilled [[Definition:Insurance broker | brokers]] negotiate [[Definition:Prior acts coverage | prior acts]] dates, transitional endorsements, or explicit carve-backs to protect clients from falling through these cracks. For underwriters, robust known-circumstance language is one of the most effective tools for controlling adverse selection and ensuring that the [[Definition:Insurance premium | premium]] charged reflects genuinely prospective risk rather than near-certain liabilities the applicant has already identified.

'''Related concepts'''
{{Div col|colwidth=20em}}
* [[Definition:Claims-made policy]]
* [[Definition:Prior acts coverage]]
* [[Definition:Material misrepresentation]]
* [[Definition:Duty of disclosure]]
* [[Definition:Professional indemnity insurance]]
* [[Definition:Adverse selection]]
{{Div col end}}

Definition:Known circumstance exclusion - Revision history

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