Res Judicata
54 In both the application and 'further amended application' (paras (ii) and (iv)), the applicant seeks a declaration that he has been, and still is, unlawfully imprisoned, and an order in the nature of a write of habeas corpus. The moving respondents submitted that a successful challenge to the legality of the applicant's current detention (the question of the legality of the applicant's former detention is dealt with below) is precluded by the principle of res judicata. The rule comes into operation whenever a party attempts in a second proceeding to litigate a cause of action which has merged into judgment in a prior proceeding: Port of Melbourne Authority v Anshun Pty Ltd (1981) 147 CLR 589 at 597 per Gibbs CJ, Mason and Aickin JJ.
55 In the joint judgment in Anshun, their Honours at 597 said:
'The distinction between res judicata (in England called "cause of action estoppel") and issue estoppel was expressed by Dixon J. in Blair v. Curran [(1939) 62 CLR 464 at 532] in these terms: "in the first the very right or cause of action claimed or put in suit has in the former proceedings passed into judgment, so that it is merged and has no longer an independent existence, while in the second, for the purpose of some other claim or cause of action, a state of fact or law is alleged or denied the existence of which is a matter necessarily decided by the prior judgment, decree or order."
The distinction was restated by Fullagar J. in his dissenting judgment in Jackson v. Goldsmith [(1950) 81 CLR 446 at 466]. His Honour expressed the rule as to res judicata by saying: "where an action has been brought and judgment has been entered in that action, no other proceedings can thereafter be maintained on the same cause of action. This rule is not, to my mind, correctly classified under the heading of estoppel at all. It is a broad rule of public policy based on the principles expressed in the maxims 'interest reipublicae ut sit finis litium' and 'nemo debet bis vexari pro eadem causa.'" His Honour went on to discuss issue estoppel, citing the comment of Dixon J. in Blair v. Curran [at 531]: "A judicial determination directly involving an issue of fact or of law disposes once for all of the issue, so that it cannot afterwards be raised between the same parties or their privies."
The difference between res judicata (cause of action estoppel) and issue estoppel has been expressed in similar terms in the House of Lords - see Carl Zeiss Stiftung v. Rayner & Keeler Ltd. [[1967] 1 AC 853 at 913, 964 et seq].'
56 In the present case, the prior proceeding comprises the s 21 (review and appeal) proceedings. On 12 April 2007, Deputy Chief Magistrate Cloran determined that the applicant is eligible for surrender to the Republic of Croatia in relation to the extradition offences. On the same day, Cloran DCM issued a warrant pursuant to s 19(9) of the Act committing the applicant to prison to await surrender under a surrender warrant or temporary surrender warrant or release pursuant to an order under s 22(5) of the Act ('the s 19 warrant').
57 On 23 April 2007, the applicant commenced a proceeding in this Court seeking review under s 21 of the Act of the Magistrate's determination and the order made under s 19(9) that the applicant be committed to prison. That proceeding was dismissed by Cowdroy J on 3 February 2009. The applicant filed a notice of appeal in relation to Cowdroy J's judgment on 16 February 2009. After a Full Court of this Court allowed the applicant's appeal, and quashed the order of the magistrate (namely, the s 19 warrant), the High Court subsequently allowed the Republic of Croatia's appeal and, notably, ordered 'that the orders made by Deputy Chief Magistrate Cloran on 12 April 2007 are confirmed': Republic of Croatia v Snedden (2010) 266 ALR 621.
58 The identity of the causes of action in question is determined by matters of substance rather than by the form of the particular proceeding or the way in which it is pleaded: Trawl Industries of Australia Pty Ltd (in liq) v Effem Foods Pty Ltd (1992) 36 FCR 406 at 418 (Gummow J) (confirmed (1993) 43 FCR 510); Somanader v Minister for Immigration & Multicultural Affairs (2000) 63 ALD 670 at [53] (Merkel J). In the present case, the substance of both the prior and present proceeding is the same: namely, a challenge to the legality of the instrument that authorises the imprisonment of the applicant.
59 The function of this Court under s 21 of the Act is to review an order made under subss 19(9) or (10) (whichever is applicable). As the plurality in Pasini v United Mexican States (2002) 209 CLR 246 held (at [16] - [17]):
'When a court is required to review an administrative decision, it is required, at the very least, to determine whether or not that decision is erroneous in some respect that renders the rights or liabilities of the person to whom it relates other than as set out in that decision. In doing so, the court declares and enforces the law and, thus, exercises judicial power.
In the case of review under s 21 of the Act, the Federal Court is required, if the magistrate's decision was erroneous, to determine what order should have been made by the magistrate. So much follows from s 21(2)(b) and (6) of the Act.'
60 The resolution of the prior s 21 proceeding, culminating in the confirmation of the Magistrate's orders, has resolved the question of whether the Magistrate's decision was erroneous. More particularly, it has resolved the question of whether the applicant is imprisoned pursuant to lawful authority (by way of the s 19 warrant). The applicant is precluded from revisiting this question by the operation of the rule of res judicata. Importantly, if res judicata applies, there is no discretion to allow the proceeding to continue. By operation of law, the applicant is not able to maintain the proceeding as the plea, if made out, is a complete bar to the claim as the cause of action is extinguished by the first judgment: Somanader at [45] (Merkel J); Anshun at 612 - 613 (Brennan J); Chamberlain v Deputy Commissioner of Taxation (1988) 164 CLR 502 at 512 (Dawson J).
61 Furthermore, insofar as the applicant seeks an order in the nature of habeas corpus, it is impermissible to invoke the writ (a prerogative remedy) as a means of attempting to review a conviction or sentence. A warrant, on its face valid and sustained by the orders of the court, sufficiently answers the writ of habeas corpus: see Young v Registrar, Court of Appeal [No 3] (1993) 32 NSWLR 262 at 285 (Kirby P); Ex parte Williams (1934) 51 CLR 545 at 549 - 551 (Dixon J). Similarly, the s 19 warrant answers the writ sought in the present proceeding. As Deane J stated in Re Officer in Charge of Cells, ACT Supreme Court; Ex parte Eastman (1994) 123 ALR 478 at 480, the writ of habeas corpus is 'not ... available as a means of collaterally impeaching the correctness of a judgment or order made by a court of competent jurisdiction which is not shown to be a nullity'. The only way in which the authority of the warrant could be overcome, as the lawful basis for the applicant's imprisonment, would be by appeal (this avenue has been exhausted).