Perry J dismissed the application for costs against Mr Ngo personally and made no order as to costs. The Court gave several reasons, each of which mattered to the result.
First, the Court rejected the applicants' submission that the trustees could simply be treated as standing in Mr Ngo's shoes for the purpose of connecting him to the Federal Court proceeding. There was no evidence that Mr Ngo instructed the trustees in the proceeding as his proxy, and the trustees submitted that this was not the case.
The Court also noted an important insolvency point: trustees are not empowered to deal with debts that are not provable in the bankrupt estate, and any costs order made against Mr Ngo personally in this proceeding would not be a debt provable in his bankruptcy.
Secondly, the Court held that the applicants had not discharged their burden of proving that Mr Ngo's motivation for entering bankruptcy was to thwart the Supreme Court proceeding. The Court accepted that the applicants may understandably suspect that this was his motivation. But suspicion was not enough. There was no direct evidence of motive. The case depended on circumstantial reasoning from timing alone.
The Court then applied orthodox principles about inference and proof. It said that where a case is circumstantial, the evidence must do more than support competing inferences of equal probability. The Court also stressed that the allegation was a serious one, so the gravity of the allegation had to be taken into account when deciding whether the civil standard of proof had been met.
On the documentary evidence, one possible inference was that Mr Ngo entered bankruptcy when the Supreme Court proceeding was well advanced in order to subvert that court's jurisdiction. But another inference was at least equally open, namely that he entered bankruptcy because he genuinely believed he could not repay his debts to creditors. Because the evidence did not move beyond suspicion, the applicants failed on proof.
Thirdly, the Court accepted that there was a causal connection between Mr Ngo's conduct and the applicants' costs in the Federal Court. Once he became bankrupt, the applicants needed leave from a bankruptcy court to continue the Supreme Court proceeding. So if he had not entered bankruptcy, they would not have needed to incur the costs of bringing the leave application. Even so, the Court said this factor was not determinative.
In circumstances where the Court had not accepted that Mr Ngo entered bankruptcy to subvert the Supreme Court's jurisdiction, causation by itself did not justify a non-party costs order.
The Court also pointed out a broader practical problem with the applicants' argument. If causation alone were enough, then in a case of voluntary bankruptcy it might always determine a non-party costs application against a bankrupt in relation to an application for leave to proceed. The Court was not prepared to adopt that approach.
Fourthly, the Court treated the lack of notice to Mr Ngo as a factor weighing against the order. The applicants argued that prior notice is not a strict prerequisite to a non-party costs order and suggested that notice could still be given if the Court considered it necessary. The Court accepted that notice is not always mandatory, but said its absence can weigh against the exercise of discretion.
Here, once it became apparent that the applicants intended to seek costs against Mr Ngo personally, it was open to them to seek to join him to the costs application or otherwise put him on notice. They had not done so.
The Court was also not willing to reopen the process at that late stage. The matter had already been fully argued in writing and was reserved. The judgment notes that the only possible explanation for the lack of earlier notice was that the applicants may not have had a physical address for service for Mr Ngo, but it was unclear whether they had other means of contacting him, such as email, and no explanation had been given as to why they had not earlier asked the trustees for his contact details.
Taking into account the overarching purpose of civil practice and procedure, the Court did not consider it appropriate to allow a further opportunity to provide notice. The result was that the application for costs against Mr Ngo was dismissed and there was no order as to costs in the proceeding.