A tortious interference with contract claim is only proper when a defendant causes a third-party (not the plaintiff) to breach the underlying contract. Tortious interference occurs when one person or entity acts willfully and with intent to undermine or get in the way of a contract or business agreement.Our New York City business litigation lawyers handle tortious interference with business cases for business of varying disciplines and sizes. Tortious interference cases typically turn on the third element of proof intention and lack of justification. Tortious interference occurs when a third party intentionally acts to disrupt an individual's expectancy of an inheritance, resulting in financial losses. Proving to a court that a third party intentionally interfered in a business relationship or contract is complicated. You face an important decision: to take on the case or refer it out. Of Orange, 700 F.3d 635, 640 (2d Cir. 2012). Confidential, secure access. Switch plans or cancel any time.