The "extrinsic facts" test is a guideline to establish whether an insurer owes a duty of defense to...
"four-corners" test
The four-corners test is a legal principle to establish whether an insurer owes a duty of defense to its insured.
Additional Information
The insurer owes a duty of defense to its insured if the formal allegations of a claim or suit match the literal provisions of the insurance policy, regardless of any differing or contradictory facts known or knowable to the insurer.
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