There are certain key elements that must be demonstrated for tortious interference with a contractual business relationship.  Generally, you must be able to show the existence of a contractual relationship, that the tortfeasor had knowledge of.  The tortfeasor must intentionally and without justification cause a breach or disruption in the contractual relationship. Finally, the tortfeasor’s actions in causing the breach or disruption must have resulted in damage to your business.  Usually, the tortfeasor’s tortious interference must be intentional rather than negligent, in order for you to collect damages and must include some sort of wrongful act and/or improper use or access of confidential information in which a tortfeasor uses to interfere with your contractual relationship.

As with all litigation, it is essential that you first consult with an experienced attorney to ensure you have cause and enough evidence to pursue your case.