TLDR:
The corporate fiction will be disregarded when the corporation is the alter ego of a person, and when to observe the corporation would work an injustice. . . . Arizona courts consider various factors to determine whether the requisite unity of interest and ownership exists, such as commingling of personal and corporate funds and assets, failure to keep funds from various entities separate, and unauthorized diversion of corporate funds or assets for non-corporate purposes. . . . The doctrine of piercing the corporate veil is typically applied when a plaintiff seeks recovery against the assets of a corporate shareholder or director. . . . But courts have, in certain instances where justice so required, applied the doctrine to reach a non-shareholder, non-director party with unity of interest and ownership to a tortfeasor.
