Tortious interference with business relations involves a third party using false claims against a business in order to drive business away. That interference can occur when an outside party purposefully leads someone in a business agreement to break the terms of the agreement.In order to make a tortious interference claim, the plaintiff must have previously had a valid contractual or business relations with another party. Has your business suffered due to competitor interference with a contract? Wrongful interference with a business relationship requires select answer that the third party is select answer with a purpose of select answer. Defenses to tortious interference with an existing contract include limitations, immunity, privilege or justification, or plaintiff's fault. Tortious interference with contract requires a breach of contract. El Paso Healthcare Sys. Ltd. v. As my colleague, Mr. Ninomiya, points out: intentionally damaging one's business reputation is tortious interference. Proving to a court that a third party intentionally interfered in a business relationship or contract is complicated.