Wrongful interference with a contractual relationship requires that there is a valid contract between two parties, a third party who knows the contract exists. The tort of intentional interference with contractual relations is still an emerging economic tort in Canada.This type of claim arises when a party attempts to derail a potential business relationship or contractual negotiations. Tortious Interference: A civil wrong that occurs when one party interferes with the contractual or business relationship of another party. Wrongful interference with a contractual relationship occurs when:1) A valid and enforceable contract exists between two parties. The existence of a valid contractual relationship or business expectancy between two parties. Wrongful interference with a contractual relationship requires that there is a valid contract between two parties, a third party who knows the contract exists. Interference with Contractual Relations, A Property Limitation, 18 STAN. Of broken contract). Therefore, summary judgment in favor of Aetna on BAI's claim for tortious interference with a prospective business relationship is proper.