Wrongful interference with a contractual relationship occurs when:1) A valid and enforceable contract exists between two parties. If a third party unfairly interferes with a business contract or relationship and causes damage, a tortious interference claim may be a viable option.Intent of the third party to induce a party to the relationship to breach the relationship. Intentional interference happens when a person intentionally causes the breakdown of a business relationship you have with a third party. Tortious interference with a contract occurs when a party improperly disrupts a contractual relationship between other parties. Under English law, interference with business relations is tortious only if the defendant's act is independently wrongful or it is part of a conspiracy. See. In these cases, plaintiffs use interference claims as a source of right within a contractual relationship. 1. Expanding Remedies for Breach. Or Advantageous Relationship. Interference With Contract - Not A Corporate Officer.