Tretjak v The Motor Vehicle Insurance Trust

This matter came before the High Court of Australia on an application for special leave to appeal and to enlarge time. The applicant, Mr Tretjak, had succeeded in the first instance before Judge Kennedy but this decision was reversed on appeal by the Full Court. The appeal to the Full Court had focused on the evidence of the applicant's former wife, Mrs Tretjak, and a witness for the respondent, Mr van Emden.

The central legal issue before the High Court was whether the Full Court had erred in principle by overturning the trial judge's findings of fact. Specifically, the applicant argued that the Full Court had failed to properly apply the principle established in *Brunskill v Sovereign Marine & General Insurance Co*, which governs when an appellate court may intervene in a trial judge's findings of fact, particularly where the trial judge has had the advantage of hearing the witnesses. The applicant contended that the Full Court's judgments did not clearly articulate how the trial judge had demonstrably erred on the central question of whether an unknown or unidentified vehicle existed, and that the appellate court's decision appeared to be based on a mere difference of opinion on credibility rather than a palpable error.

The applicant submitted that the Full Court's reasoning, which found Mrs Tretjak's evidence not credible, contradicted by Mr van Emden's evidence, and that the trial judge had made mistakes in her findings of fact, did not sufficiently address the core issue. The applicant argued that for the Full Court to intervene on the basis of misusing the advantage of hearing witnesses, it needed to identify specific points of demonstrable error in the trial judge's findings on the central question. The applicant pointed out that only one judge on the Full Court referred to *Brunskill's* case, and that the judgments generally lacked detailed explanation as to how the trial judge's findings were palpably wrong, particularly concerning the credibility of Mrs Tretjak and the ultimate determination of the existence of an unidentified vehicle.