Christie v Ah Sheung

This case concerned an appeal to the High Court of Australia from a decision of a Police Magistrate in Victoria. The respondent, Ah Sheung, a Chinese national, had been prevented from landing in Melbourne by the ship's captain on the grounds that he was a prohibited immigrant under the Immigration Restriction Acts, having failed a dictation test. Ah Sheung had previously been released from detention by order of Cussen J. of the Supreme Court of Victoria, who had found, on affidavit evidence, that Ah Sheung was identical with a naturalised Victorian subject of the King of that name and was domiciled in Victoria.

The legal issue before the High Court was whether the judgment of Cussen J. was admissible and conclusive evidence in a subsequent prosecution of Ah Sheung for being a prohibited immigrant, specifically on the question of his identity as a naturalised Victorian subject. The defence had relied on this judgment to establish that Ah Sheung was not an "immigrant" within the meaning of the Acts.

The High Court held that the judgment of Cussen J. was not admissible evidence of the fact of Ah Sheung's identity as a naturalised subject in the prosecution against him. While Cussen J. had found Ah Sheung to be a naturalised subject, that finding was only conclusive between Ah Sheung and the ship's captain in the habeas corpus proceedings. The Police Magistrate had erred in treating the Supreme Court's judgment as conclusive on the question of identity and in refusing to hear further evidence on the matter.

The appeal was allowed, and the case was remitted to the Police Magistrate for a re-hearing. The magistrate was instructed to determine for himself, based on admissible evidence, whether the respondent was indeed the person named in the letters of naturalisation. If he found that the respondent was not that person, he was to convict.