Pennsylvania Federal Court Holds Insurer Can’t Use Insured’s Admission to Withdraw Defense

It has long been the rule, under Pennsylvania law, that an insurer’s duty to defend is determined “solely” by the allegations in the “four corners” of the complaint against the insured. Kvaerner Metals Div. of Kvaerner U.S., Inc. v. Commercial Union Ins. Co., 908 A.2d 888, 896 (Pa. 2006). A corollary of that rule —