The Court held that additional security should be provided to both respondent groups. McElwaine J said the threshold for the exercise of the discretion was met because the Clancy parties were impecunious and would be unable to satisfy an adverse costs order. The Court emphasised the protective purpose of security for costs. It is meant to strike an appropriate balance between allowing an impecunious applicant to continue litigation and protecting a successful respondent from the frustration of a later costs order.
For the So parties, the Court accepted that the existing security only covered costs up to the first day of trial. The risk of non-recovery for costs from the second day of trial onward was therefore real. The Court accepted Ms Drew’s estimate of about $775,000 as a reasonable estimate of recoverable party-and-party costs for that period.
The Court rejected the applicants’ submission that a broad discount of around 50% should be applied. It explained that in some cases a discount is used to move from actual or indemnity costs to a reasonable estimate of recoverable party-and-party costs. But here, Ms Drew’s figures already represented estimated recoverable party-and-party costs. The Court said a discount for contingencies might sometimes be appropriate, for example if a trial may take less time than expected, but it declined to apply one here, particularly because the applicants had not shown they could not provide the extra security.
For the TM parties, the Court accepted Ms Drew’s estimate of about $1.7 million for the entire proceeding, before crediting the existing $175,000 security. Again, the Court rejected a broad discount. However, it accepted that there had been identifiable delay in the TM parties seeking further security and applied a modest 5% discount on a broad-brush basis to carve out part of the costs incurred during the delay period.
On the argument about changed circumstances, the Court said that even if a material change were required, it was present here. The trial estimate had increased by two weeks, and the claims had been considerably expanded when leave to amend was granted on 25 August 2025, including new claims of fraud and dishonesty against Mr So. More broadly, the Court said the discretion under s 56(3) of the Federal Court of Australia Act to reduce or increase security is unfettered and turns on the facts and circumstances of the case.
The Court also rejected the applicants’ global submission that the total existing security pool was enough. It said the extent to which the unallocated amount of the existing security might later be applied in satisfaction of costs orders was a separate issue and did not answer the need for additional protective orders now.