Tortious interference under Michigan law requires proof not only that the conduct was intentional but that it was improper. Along with knowledge and intent, the plaintiff must show that the defendant did something intentionally wrong to interfere with the contract.Tortious interference occurs when someone intentionally interferes with a contract or business relationship between two other people or companies. Business interference, often known as tortious interference, involves one party intentionally damaging another's business relationships or contracts. Because we conclude that. Tortious interference requires more than mere "involvement in the activities and concerns of other people when your involvement is not wanted." What Elements Are Required to Prove Wrongful Interference? Tortious interference claims arise when a third party intentionally disrupts a business relationship, causing harm to one of the parties involved. The jury returned a verdict in favor of defendants on plaintiff's claim for tortious interference with a business relationship. You will have to present evidence that the person is threatening you or deliberately trying to cause you harm through harassment.