Was there an effective offer?
21 The first question is whether the offer was an offer for the purposes of the rule. I agree with Hodgson JA that there was no substance in the plaintiff's contentions of procedural non-compliance.
22 There is a second basis on which, according to the authorities, an offer may fail to comply with the rules. That is said to happen in circumstances where the offer was not a "genuine offer of compromise" because it contained "no real element of compromise": see Leichhardt Municipal Council v Green [2004] NSWCA 341 at [23] (Santow JA), applied in Baresic v Slingshot Holdings Pty Ltd (No. 2) [2005] NSWCA 160 at [13] (Beazley JA, Mason P and Bryson JA agreeing).
23 There is also some suggestion in the cases that an offer may not qualify if the offer is not a bona fide offer, apparently because the Court can discern that the offeror's purpose was merely to invoke the rule and not to compromise its position: see Tickell v Trifleska Pty Ltd (1990) 25 NSWLR 353 at 355 (Rogers CJ Comm D), approved in Hobartville Stud Pty Ltd v Union Insurance Co Ltd (1991) 25 NSWLR 358 at 367-368 (Giles J); Leichhardt Municipal Council at [57] (Santow J) and Baresic at [13]-[14] (Beazley JA).
24 Why an offer which is "merely advanced to enliven the costs sanctions under the Rules" is otherwise than a valid offer, given that it can have no other purpose, is unclear: cf Baresic at [14], following Leichhardt Municipal Council. Further, it seems unlikely that these authorities intended that there be some inquiry into the motives of the party making the offer. For practical purposes, that approach can be put to one side. The real question, as it appears, is whether the Court can discern in the amount of the offer a failure to compromise.
25 How that is to be assessed has not been clearly explained. In Maitland Hospital v Fisher [No 2] (1992) 27 NSWLR 721, the Court (Kirby P, Mahoney JA and Samuels AJA) appears to have assessed the offer by reference to the final judgment. It was a case in which the plaintiff offered to compromise her claim for $200,000 and was ultimately awarded a judgment in the sum of $206,090. After discussing the nature of the assessment of damages, the Court stated at 725C:
"In such circumstances, the offer of compromise was one which realistically assessed the chances of success in the appeal. It offered an inducement (admittedly small) to the appellant against the risks which are inherent in any litigation. Events have borne out the justification of the actual offer made and the wisdom of making it."
26 The Court also referred to the fact that the difference between the offer and the judgment was "small, being only 2.5% of the judgment sum" but was "real and not trivial or contemptuous": at 725A-B. There may be an inference that the Court would have treated an even smaller variation as "trivial or contemptuous" and not as a genuine offer, but that inference was not made express. The remainder of the paragraph suggests that the Court was addressing the question of discretion, not the question of the validity of the offer.
27 There are other difficulties. In Maitland Hospital, it was said of the difference between the sum offered and the judgment that the amount was "a real sum" for a person in the position of the plaintiff: at 725B. That invites a differential approach to the degree of compromise offered by a kitchen maid (as in Maitland Hospital) and a large corporation or its insurer. There is no authority which expressly supports that approach.
28 Further, the fact that the costs rule applies where the offer is equal to the judgment suggests that the validity of the offer for the purposes of the rule is not to be assessed according to the degree of departure from the outcome. On the other hand, it would be unfortunate if such matters were to be assessed according to the state of knowledge, legal advice and other circumstances relating to the offeror at the time the offer was made. Such an approach would invite disputation, with the offeree challenging the offeror to put on evidence of those matters and invoking the rules in Jones v Dunkel [1959] HCA 8; 101 CLR 298, if it did not. One can envisage cases (which may include the present) where a defendant is confident of succeeding in litigation, but makes a commercial decision based on expectations as to the amount of unrecoverable costs which would be incurred if the matter went to trial (and possibly appeal). A defendant which offered to settle a claim for an amount which was intended to reflect those unrecoverable costs would, in my view, be acting appropriately within the terms of the rules; the offer would not be otherwise than genuine or bona fide and it would involve a real element of compromise, whatever that may mean.
29 This case having been dealt with by way of brief written submissions on the question of indemnity costs, it does not provide an appropriate occasion to consider the manner in which the relevant principles have been developed, either in this Court or in comparable jurisdictions. Nevertheless, there may be merit in the comment of Hodgson JA in Commonwealth of Australia v Gretton [2008] NSWCA 117 that the terms of the rules have changed over time and it may be necessary to consider the significance of changes in relation to the application of earlier authority: at [113]. It may also be necessary to consider the appropriateness of applying principles developed in relation to Calderbank offers with respect to offers made in compliance with the relevant rules. There are many examples of cases in which such distinctions have not been identified or considered, including The Anderson Group Pty Ltd v Tynan Motors Pty Ltd (No. 2) [2006] NSWCA 120; 67 NSWLR 706 at [8], although the importance of distinguishing Calderbank offers was noted: at [10]. In that case the offer was assessed as involving an increase of 20% on the final judgment and therefore as involving a "genuine element of compromise": at [12]. It was not necessary to address the appropriateness of that test.