In its decision released last Fall in Davy Estate v. CIBC World Markets Inc. , the Ontario Court of Appeal affirmed an Ontario Superior Court order striking out a third party claim in which the defendant had tried to sue the plaintiff’s lawyer. The third party claim had alleged that the plaintiff’s lawyer had given the plaintiff bad advice on the mitigation of her damages. In addition to finding that the third party claim against the plaintiff’s lawyer could not succeed at law, the Court of Appeal also cited policy reasons against permitting one party to sue another party’s lawyer for alleged negligence; noting that such claims undermine a lawyer’s loyalty to their client and invade the sanctity of the lawyer-client relationship. Full article