Collateral attack on corporate existence

The rule of general law which does not permit the existence of a corporation to be indirectly attacked. The assertion that it had no legal existence, because it was an unlawful combination in violation of the anti-trust act, was irrelevant to the question of the liability of the manufacturing company to pay for the goods, since such defense was a mere collateral attack on the organization of the corporation, which could not be lawfully made.