This article discusses what constitutes wrongful interference under Arizona law. If a person improperly interferes with another person's contract, then the wrongdoer will have to pay money damages to the injured person (i.e.COMMENT: Defining Improper Conduct. In the Wagenseller case, the supreme court ruled that improper conduct was an element of interference with contract cases. Tortious interference occurs when a third party disrupts an existing or prospective business relationship between two or more other parties. Tortious interference with a contract occurs when a third party intentionally damages the contractual between two parties. Wrongful or tortious interference with contracts happens when a thirdparty intentionally causes a contracting party to commit a breach of contract. If a third party unfairly interferes with a business contract or relationship and causes damage, a tortious interference claim may be a viable option. In What Ways Does the Law Regulate Tortious Interference? The Arizona Court of Appeals reversed in part, vacated in part and remanded.