Surrender
33 The question of surrender was addressed by McHugh J in Ex parte Lai Qin (supra), in which an applicant for a protection visa under the Migration Act 1958 (Cth) commenced proceedings in the High Court for prerogative relief. Before the application was heard, the Minister exercised his discretion under the Act and granted a protection visa. His Honour stated at 624-625:-
" In an appropriate case, a court will make an order for costs even when there has been no hearing on the merits and the moving party no longer wishes to proceed with the action. The court cannot try a hypothetical action between the parties. To do so would burden the parties with the costs of a litigated action which by settlement or extra-curial action they had avoided. In some cases, however, the court may be able to conclude that one of the parties has acted so unreasonably that the other party should obtain the costs of the action. In administrative law matters, for example, it may appear that the defendant has acted unreasonably in exercising or refusing to exercise a power and that the plaintiff had no reasonable alternative but to commence a litigation…
…
If it appears that both parties have acted reasonably in commencing and defending the proceedings and the conduct of the parties continued to be reasonable until the litigation was settled or its further prosecution became futile, the proper exercise of the cost discretion will usually mean that the court will make no order as to the cost of the proceedings ."
34 However, McHugh J also observed that, in some cases, a judge may feel confident that, although both parties have acted reasonably, one party was almost certain to have succeeded if the matter had been fully tried (at 625).
35 In One.Tel (supra), Burchett J considered the authorities on the issue of surrender. His Honour observed at [6]:-
" [6] In my opinion, it is important to draw a distinction between cases in which one party, after litigating for some time, effectively surrenders to the other, and cases where some supervening event or settlement so removes or modifies the subject of the dispute that, although it could not be said that one side has simply won, no issue remains between the parties except that of costs. In the former type of case, there will commonly be lacking any basis for an exercise of the Court's discretion otherwise than by an award of costs to the successful party. It is the latter type of case which more often creates problems, since there may be difficulty in discerning a clear reason why one party, rather than the other, should bear the costs ."
36 The applicants in One.Tel (supra) sought to challenge the validity of certain notices, and to have them set aside. The respondent, after initially defending those notices, encountered an evidentiary difficulty, and acknowledged that they were to be set aside. Considering the question of reasonableness, his Honour found that the respondent's earlier stance must have been unreasonable, at least once the true position had been ascertained. Yet that stance was maintained by opposition to the applicant's motion to amend, and by service of the notice to admit facts. It was only abandoned after the applicants defeated the attempt to obtain admissions. Accordingly, his Honour concluded that the respondent should be ordered to pay the costs of the applicants.
37 As discussed above, the plaintiffs submitted that the Director-General's letters of 9 and 13 October 2009 constituted a surrender by the defendant on the issues of apprehended bias and procedural fairness at the hearing as provided in Grounds 4 and 6 of the Summons. The defendant submitted that the letters did not amount to surrender in respect of Grounds 4 and 6 as these communications did not constitute the only factor in determining the merits of these grounds.
38 Ground 4 of the Summons had three bases (at [152]):-