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📋 '''Prior insurance clause''' is a provision found in certain [[Definition:Insurance policy | insurance policies]] — particularly [[Definition:Claims-made policy | claims-made]] forms of [[Definition:Professional liability insurance | professional liability]], [[Definition:Directors and officers liability insurance (D&O) | directors and officers (D&O)]], and [[Definition:Errors and omissions insurance (E&O) | errors and omissions (E&O)]] coverage — that conditions the insurer's obligations based on whether the [[Definition:Insured | insured]] maintained continuous, uninterrupted coverage prior to the inception of the current policy. This clause addresses the risk that an insured might allow a gap in coverage and then purchase a new claims-made policy attempting to secure retroactive coverage for events that occurred during the uninsured period. While it can appear in policies issued in virtually any jurisdiction, the clause is especially prominent in the U.S. and London markets, where claims-made coverage is standard for many liability lines.

🔎 In practice, a prior insurance clause typically requires the insured to warrant that they carried comparable [[Definition:Liability insurance | liability]] coverage continuously since a specified date — often the [[Definition:Retroactive date | retroactive date]] stated in the current policy. If the insured failed to maintain prior coverage or allowed it to lapse, the clause may void or restrict coverage for any [[Definition:Claim | claims]] arising from acts, errors, or omissions that occurred during the gap period. The clause functions alongside related policy mechanisms such as the retroactive date and the [[Definition:Prior knowledge exclusion | prior knowledge exclusion]], creating a layered framework through which the [[Definition:Underwriter | underwriter]] controls adverse selection. When negotiating renewals or tower placements, [[Definition:Insurance broker | brokers]] pay close attention to how prior insurance clauses interact with predecessor policies, especially when an insured is switching carriers or restructuring their coverage program.

⚠️ The real-world importance of the prior insurance clause becomes apparent when a claim surfaces years after the alleged wrongful act. If the insured had a gap in coverage — even a brief one — the clause can provide the current insurer grounds to deny the claim, leaving the insured exposed at precisely the moment they believed they were protected. For this reason, [[Definition:Risk manager | risk managers]] and brokers emphasize the critical importance of maintaining unbroken claims-made coverage and carefully reviewing prior insurance clause wording before binding a new policy. In multi-layered or international programs, where [[Definition:Excess insurance | excess]] and [[Definition:Umbrella insurance | umbrella]] policies sit above a primary claims-made form, inconsistencies in prior insurance clause language across layers can create unintended coverage gaps that only emerge during complex [[Definition:Claims handling | claims handling]].

'''Related concepts:'''
{{Div col|colwidth=20em}}
* [[Definition:Claims-made policy]]
* [[Definition:Retroactive date]]
* [[Definition:Prior knowledge exclusion]]
* [[Definition:Continuity of coverage]]
* [[Definition:Professional liability insurance]]
* [[Definition:Directors and officers liability insurance (D&O)]]
{{Div col end}}

Definition:Prior insurance clause - Revision history

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