US: (1) A risk or a part of a risk for which there is no normal insurance market available. (2) Insurance written by non-admitted insurance companies.
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A risk that cannot be insured by the agents in its jurisdiction.
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See: Excess & surplus lines market.
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MEDICAL, US: Special property liability insurance coverage by an insurer not licensed to transact business in the state where the risk is located. Also referred to as excess-surplus lines .