1) If he doesn't show up, he will lose--period. It's called defaulting, and it's like losing a baseball game by not showing up with enough players or on time and so forfeiting. The order will be granted against him and he'll be subject to its terms.2) If he believes that the other person is doing something improper, such as a maliciously and improperly (without good basis or grounds) using the legal process to harass, or defaming him by making untrue factual statements about him, your son may be able to bring a legal action. However, neither of these actions are easy ones for the layperson; you son should consult with an attorney if taking legal action against the other is something he is seriously contemplating.