Discussion
26There are a number of issues to be determined, namely the construction of the acknowledgment of loan, whether a debt is owed to the estate and whether the cross-defendant is obliged to pay interest.
27At the outset, it should be noted that it is not disputed that the amount of $881,000 has not been repaid. Furthermore, the two conditions set out in the loan acknowledgment, namely that the deceased did not make demand for the repayment of the loan and that Mr Steiner was named as a residual beneficiary, have both been met.
28Mr Steiner was the only witness required for cross-examination. He accepted that other payments had been made to him by his mother (14 payments totalling approximately $1.2 million) but those other payments were not accompanied by any documentation suggestive of a loan arrangement.
29There was no evidence as to any terms or conditions to be attached to the provision of moneys prior to the execution of the acknowledgment (other than, of course, its characterisation as a loan or a gift), although nor was Mr Steiner asked to accept that the conditions in the acknowledgment of loan were in fact agreed to prior to the execution of that document.
30However, in my mind, Mr Steiner was clearly satisfied that the terms in the acknowledgment of loan were terms upon which he agreed to be bound, not only because he executed it but more importantly because he was the party that took the initiative and instructed his solicitor to prepare it.
31Counsel for the cross-defendant puts forward a submission that the consideration for signing the Acknowledgement of Loan was past consideration, relying on the fact that the document was brought into existence after the whole of the moneys were advanced.
32To my mind, this fundamentally misconceives the nature of the acknowledgment of loan. It is objectively not intended to be the contract between the parties, but an acknowledgment of a loan already entered into. In that sense, it is properly to be regarded as an admission or as admissible post-contractual conduct.
33In Cross on Evidence (9th edition), the learned author J D Heydon observes at [39290] that:
The post-contract conduct of the parties may, of course, be relevant to matters other than the construction of the document... And where there is a dispute as to the existence of a contract, or the contract is oral (Carmichael v National Power plc [1999] 4 All ER 897) or there is a question as to how the contract is to be characterised (Bankway Properties Ltd v Pensfold-Dunsford [2001] 1 WLR 1369)... the parties' subsequent conduct may be relied upon to establish the existence of that contract, and what the terms of that contract were...
34In Lym International Pty Ltd v Marcolongo [2011] NSWCA 303, Campbell JA additionally observed:
[139] Third, where a contract is oral, post-contractual conduct may be used to ascertain the subject matter of the contract. Such use of subsequent conduct is justified when it is "relevant, on an objective basis, to the identification of the subject matter of the contract or the determination of the necessary terms, as distinct from deciding the meaning of words". Such subsequent conduct is relevant in that way when "what was done later [is] a basis for inferring what was agreed when the contract was made, or as establishing later additions or variations", citing Browne LJ in Ferguson v John Dawson & Partners (Contractors) Ltd [1976] 1 WLR 1213 at 1229.
[140] I respectfully agree with Spigelman CJ's analysis. Other authority that where a contract is partly written and partly oral, the terms of the contract are to be ascertained from the whole of the circumstances as a matter of fact is collected in Masterton Homes Pty Ltd v Palm Assets Pty Ltd [2009] NSWCA 234; (2009) 261 ALR 382 at [90].
[141] There is a vast difference between the task that is involved in interpreting a wholly written contract, and the task involved in finding what has been agreed in a contract that is not wholly in writing. The difference between those tasks in itself makes a vast difference between the circumstances in which post-contractual conduct can be relevant for the respective tasks.
[142] Where there is a contract that is wholly in writing, there is no doubt what the contract is - it is the writing. The task of interpretation is ascertaining the meaning that the bystander who knows all the relevant surrounding circumstances would understand from the parties using the words in that writing. The admissibility of evidence for interpreting a wholly written contract is decided by reference to whether it is able to assist in ascertaining the meaning that the bystander who knows all the relevant surrounding circumstances would understand from the parties using those words. Save in the case of post-contractual events providing retrospectant evidence of a surrounding circumstance that was known to the parties at the time of contracting, the view favoured in this court is that post-contractual conduct cannot assist in that task, and thus is not admissible, or if admitted cannot legitimately be used in that task: the cases cited by McColl JA in County at [161] ([118] above).
[143] By contrast, the task in ascertaining what are the terms of a contract that is not wholly in writing is quite different - the task is finding as a fact what the parties have agreed. A range of post-contractual conduct could be relevant to ascertaining what the parties have agreed. For example, their conduct in carrying out the contract could itself be objective evidence of what they had agreed, an admission of one of the parties could assist in ascertaining what they have agreed, and business records created to record or report on the contract rather than carry it out could also assist in that task.
35The statement in James Miller & Partners v Whitworth Street Estates Ltd [1970] AC 583 at 603 per Lord Reid that "it is not legitimate to use as an aid in the construction of [a] contract anything which the parties said or did after it was made" was reaffirmed in Agricultural and Rural Finance Pty Limited v Gardiner (2008) 238 CLR 570 at [35] per Gummow, Hayne and Kiefel JJ.
36More recently, in Johnston v Brightstars Holding Company Pty Ltd [2014] NSWCA 150 the Court of Appeal considered the issue of post-contractual conduct. Basten JA observed (Gleeson JA agreeing) at [120]-[121]:
[120] There are difficulties attending the use of post-contractual statements to construe the terms of a contract. It is an accepted principle that anything which the parties said or did after a contract was made cannot be used "as an aid in the construction of" the contract: Agricultural and Rural Finance Pty Ltd v Gardiner [2008] HCA 57; 238 CLR 570 at [35] (Gummow, Hayne and Kiefel JJ), referring to the statement of Lord Reid in James Miller & Partners Ltd v Whitworth Street Estates (Manchester) Ltd [1970] AC 583 at 603. That principle derives from the "objective" theory of contract, which provides that the legal obligations of the parties to the contract do not depend upon their subjective beliefs but upon the view of the reasonable bystander informed as to the surrounding context and circumstances, which in practice means the view of the court based on the evidence before it: Mannai Investment Co Ltd v Eagle Star Life Assurance Co Ltd [1997] AC 749 at 775 (Lord Hoffmann); Wilson v Anderson [2002] HCA 29; 213 CLR 401 at [8] (Gleeson CJ); Toll (FGCT) Pty Ltd v Alphapharm Pty Ltd [2004] HCA 52; 219 CLR 165 at [40] (Gleeson CJ, Gummow, Hayne, Callinan and Heydon JJ); Attorney General of Belize v Belize Telecom Ltd [2009] 1 WLR 1988 at [16] (Lord Hoffmann, PC); and see Lewison and Hughes, The Interpretation of Contracts in Australia (Law Book Co, 2012) at [2.04]-[2.05].
[121] On the other hand, where it provides evidence of facts, the assertion of which is against the interests of one party, it may be admissible as an admission by that party. However, to the extent that the evidence reveals an opinion as to a question of law rather than fact, the admission may be irrelevant or valueless. (The relevant authorities were collected by Campbell JA in Masterton Homes Pty Ltd v Palm Assets Pty Ltd [2009] NSWCA 234; 261 ALR 382 and in Lym International Pty Ltd v Marcolongo [2011] NSWCA 303.) Alternatively, the evidence may establish contextual facts in existence at the time the contract was executed.
37Therefore, the acknowledgment of the loan should properly be regarded as post-contractual conduct which should be treated as an admission by Mr Steiner. The question of consideration being past at the point when the acknowledgment was executed simply does not arise.
38Alternatively, in my view the parties may well have come to an agreement before the provision of the remaining sum which was to be the subject of formal documentation. That formal documentation, being the acknowledgment of loan, was to reflect the terms of their agreement that it was to be a loan, not a gift. The parties, or at the very least Mr Steiner, it seems to me had anticipated that the agreement would be reflected in writing. Hence he prepared a draft and provided it to his solicitor.
39Therefore, on either characterisation of the acknowledgment of loan, I am not persuaded that the issue of whether sufficient consideration has passed between the parties properly arises. In my view, the acknowledgement of loan is a clear indication that a debt is owed to the estate. Mr Steiner agrees that (in circumstances where there was no demand before death) he will "repay the loan to my mother... to her estate upon her death". I am not satisfied, in the circumstances and on the evidence before me, that the amount of $881,000 was intended to be a gift. It can only be sensibly viewed as a loan from the deceased to Mr Steiner, and it is therefore a debt owed to her estate.