9 In reaching his conclusion in O'Connor's case, Rolfe J adopted and applied the approach taken by Brownie J in Lee Gleeson Pty Ltd v Sterling Estates Pty Ltd (1991) 23 NSWLR 571.
10 I accept that a quantum meruit lies, despite s 10(1), for residential building work done otherwise than under a written contract.
11 That raises, in the present context, the question whether such a quantum meruit claim involves a "debt". Under s 459E(1) of the Corporations Act, only a "debt" that is owing, due and payable can be the subject of a statutory demand. Under s 459H(1)(a), a statutory demand may be challenged on the basis of a genuine dispute as to the existence or amount of the "debt" to which the demand relates.
12 Mr Allen submitted that, the right to a quantum meruit in the present case is a "debt". He referred to the decision of Santow J in The Roy Morgan Research Centre Pty Ltd v Wilson Market Research Pty Ltd (No 2) (1996) 20 ACSR 170 where it was held that a claim upon a common money count for work done gave rise to a liquidated demand or claim. That, however, is not the question.
13 A "debt", for present purposes, is "a liquidated sum in money presently due, owing and payable by one person, called the debtor, to another person, called the creditor". These are the words of McPherson J in Rothwells Ltd v Nommack (No 100) Pty Ltd [1990] 2 Qd R 85 at 86. That was a case concerning a statutory demand under earlier but analogous provisions.
14 It may be noted that McPherson J referred to a "liquidated sum", not a "liquidated demand". The nature of a "liquidated sum" was explained by Knox CJ and Starke J in Spain v Union Steamship Co of New Zealand Ltd [1923] HCA 21; (1923) 32 CLR 138 at 142 by quoting from the then current edition of Odgers on Pleading:
"Whenever the amount to which the plaintiff is entitled . . . can be ascertained by calculation or fixed by any scale of charges or positive data it is . . . liquidated."
15 There was reference in Spain's case to Stephenson v Weir (1879) 4 LR Ir 369. It was held in that case that a common count claim for work done was a "liquidated demand". Palles CB said at 372:
"[D]emands for work and labour on a quantum meruit, or for goods sold, although the price was not fixed by contract, are clearly 'liquidated demands'; . . . when the value of the work or the goods as the case may be, is ascertained, that value determines and therefore liquidates the claim."
16 This statement identifies the distinction between "liquidated claim" or "liquidated demand" and "liquidated sum". A process of valuation or assessment or the application of some standard of measurement is necessary to cause the latter to emerge from or be distilled from the former.
17 The process by which a claim is translated into a right to a liquidated sum was described by Cohen J in Re Ahearn; Ex parte Palmer (1906) 6 SR (NSW) 576, a case concerning an unliquidated claim. His Honour said at 577:
"For failure to meet his contracts he was liable in damages, and, so long as it rested in damages, the liability was not a liquidated sum; before it could become so, it would have to be assessed either under the Stock Exchange rules, or by the ordinary tribunals, or by agreement between the parties, for the parties may meet and agree upon an amount which one shall be deemed to owe the other. There is no special virtue in having the amount assessed by a Court or a domestic tribunal, for an assessment between the parties is equally efficacious for the purpose of constituting the amount a liquidated sum."