The primary insurer defended an action arising from a motor vehicle accident and sought equitable contribution for defence costs from the excess insurer.
The excess insurer was not notified of the claim until four and a half years after the accident and was not plainly at risk until shortly before trial.
The application judge ordered the excess insurer to pay a proportionate share of the defence costs.
On appeal, the Court of Appeal held that an excess insurer's obligation to contribute to defence costs is premised on the existence of a duty to defend, which only arises upon notice of a claim.
Given the late notice and the fact that the excess insurer did not sit back and benefit from the primary insurer's work, it was not fair or equitable to require contribution.
The appeal was allowed and the application dismissed.