Nature of Promissory Estoppel
5Medica's case does not fit easily into any of the established categories of estoppel:
(a)This is not a case of estoppel by deed, which applies to unambiguous statements of fact in the recitals or operative provisions of a deed. Those statements bind the parties and cannot be contradicted in legal proceedings based on the deed: Discount & Finance Ltd v Gehrig's NSW Wines Ltd (1940) 40 SR (NSW) 598 at 602 (Jordan CJ).
(b)Nor is this a case of estoppel by representation, which applies where a representor makes an unambiguous representation of existing fact intending that it be relied on by a person, who acts reasonably in reliance on it and changes his position. The effect of an estoppel by representation is to prevent the representor going back on his word by denying the correctness of the representation. It has a substantive effect because it may enable a claim or defence to succeed which would otherwise have failed: Foran v Wight (1989) 168 CLR 385; [1989] HCA 51.
(c)Nor is this an estoppel by convention, which comes into existence when parties join in making some fact, or matter of mixed fact and law, the basis of their transaction or relationship. If the parties' assumption as to the relevant matter is communicated and adopted by each of them, it will bind them and prevent a return to the earlier relationship. With this kind of estoppel, the only detriment that need be shown is entry into the relationship or transaction: Thompson v Palmer (1933) 49 CLR 507 at 547; [1933] HCA 61; Grundt v Great Boulder Pty Gold Mines Ltd (1937) 59 CLR 641 at 657, 675-677; [1937] HCA 58; Con-Stan Industries of Australia Pty Ltd v Norwich Winterthur Insurance (Aust) Ltd (1986) 160 CLR 226 at 224; [1986] HCA 14 at [22].
(d)Nor is this a proprietary estoppel - either by encouragement or standing by. The former arises when a person creates or encourages an expectation in another that he will receive a proprietary interest and that person changes his position on the faith of the expectation in such a way that it would be unconscionable for the party estopped to deny the expectation: Dillwyn v Llewellyn (1862) 4 De G F & J 517 (Lord Westbury LC). The latter arises when an owner, who is aware of his rights and that they are being infringed, stands by in silence while a person who is, to the knowledge of the owner, ignorant of his rights, acts to his detriment by building on the land or otherwise improving the property: Ramsden v Dyson (1866) LR 1 HR 129 at 170.
(e)Most significantly however, it is not easy to see that the claim based on the funding promise constitutes a promissory estoppel, which is concerned with representations or conduct that induce a person to expect that a legal right will not be exercised against him: DHJPM Pty Ltd v Blackthorn Resources Ltd (2011) 285 ALR 311; [2011] NSWCA 348 at [43]. If proved, the court will restrain the exercise of the legal right. The estoppel is therefore negative and defensive in substance. And it is essentially temporary in its operation, because it does not effect a permanent change in the rights of the parties unless the promisee cannot be restored to his former position.
6Significantly, a promissory estoppel does not provide relief that effectively enforces the promise as if it were a contract: Selah v Romanous 79 NSWLR 453 at [55] and [73]-[74]; [2010] NSWCA 274; Hammond v JP Morgan Trust Australia [2012] NSWCA 295 at [26]. As Justice K R Handley wrote extra-judicially in 'The Three High Court Decisions on Estoppel 1988-1990' in (2006) 80 ALJ 724 at 728:
Non-contractual but enforceable promises which confer positive rights in personam are a recent invention without a respectable pedigree.
cf. Commonwealth of Australia v Verwayen (1990) 170 CLR 394 at 428-429 (Brennan J); [1990] HCA 39.
7In this case, Medica's submissions effectively contend that the promise of funding should be treated as if it imposed a positive obligation upon GE Healthcare to provide the promised funding. But there was little, if any, focus on whether there was a promise by GE Healthcare to refrain from exercising its legal right to payment. GE Healthcare's legal right to payment, or its legal right to the return of the equipment pursuant to its retention of title clause, is indubitable. The issue is whether there should be some equitable restraint on the exercise of either right. It is neither legally sufficient nor logically sensible for Medica to contend that, simply because a promise of funding was made and relied upon, GE Healthcare should be deprived of its right to payment and prevented from recovering its equipment. Much more is required.
8As I have been at pains to emphasise, promissory estoppel does not create new rights but only operates as an equitable restraint on the enforcement of a specified legal right: Hughes v Metropolitan Railway Company (1877) 2 App Cas 439 at 448; Legione v Hately 152 CLR 406 at 432-433; [1983] HCA 11; Selah v Romanous at [62] and [74]; Hammond v J P Morgan Trust Australia Ltd at [26]; DHJPM Pty Ltd v Blackthorn Resources Ltd at [93]. The primary condition that activates such an estoppel is an unambiguous representation, reasonably relied upon, that the promisor will not exercise the legal right.
9In this case, the only relevant expectation that emerges from Medica's evidence is an assumption that funding for the equipment would be provided by a member of the GE Group. This is not the same as proof that a representation was made and an expectation engendered, that GE Healthcare would refrain from exercising its contractual right to require payment, or its contractual right to require the return of the equipment in the event of non-payment, if funding for the equipment were not provided from a company within the GE Group. There was no evidence to support a promise or expectation to that effect. No doubt this was because the likelihood of such a promise by GE Healthcare, and such an assumption by Medica - which would have been inconsistent with the TSA - is commercially unrealistic in the extreme.
10The circumstances that make it equitable that a party should be restrained from enforcing a legal right are well known. They depend on proof of an assumption, induced by the other party, that a specified legal right will not be exercised in given circumstances. They require reliance and detriment by the promisee. If the estoppel is established, the court will restrain the exercise of the legal right. A promissory estoppel is not however a means by which freestanding promises, unsupported by consideration, may be enforced. The objective of a promissory estoppel is different - namely to restrain the unconscientious exercise of a legal right in circumstances where a party has been reasonably led to believe that that right will not be exercised, and where it has relied to its detriment on that assumption.
11In this case, I have found as a matter of fact that there was no promise of funding and no 'functionality' promise. But more importantly, at least from the perspective of legal principle, there was no promise and no assumption that GE Healthcare would refrain from exercising its legal right to compel payment, or to recover its property in the event of non-payment. Medica's case seemed to assume that it was sufficient to prove a promise and an assumption about the provision of finance and about the functionality of the equipment, rather than, of greater importance, a promise and an assumption about the non-exercise by GE Healthcare of its legal rights. For that reason alone, the estoppel must fail. But I should now turn to the facts.