In jurisdictions following the English common law system, equity is the body of law which was developed in the English Court of Chancery and which is now administered concurrently with the common law.
For much of its history, the English common law was principally developed and administered in the central royal courts: the Court of King's Bench, the Court of Common Pleas, and the Exchequer. Equity was the name given to the law which was administered in the Court of Chancery. The Judicature Reforms in the 1870s effected a procedural fusion of the two bodies of law, ending their institutional separation. The reforms did not effect any substantive fusion, however. Judicial or academic reasoning which assumes the contrary has been described as a "fusion fallacy".
Jurisdictions which have inherited the common law system differ in their current treatment of equity. Over the course of the twentieth century some common law systems began to place less emphasis on the historical or institutional origin of substantive legal rules. In England, Australia, New Zealand, and Canada, equity remains a distinct body of law. Modern equity includes, among other things:
- The law relating to express, resulting, and constructive trusts;
- Fiduciary law;
- Equitable estoppel (including promissory and proprietary estoppel);
- Relief against penalties and relief against forfeiture;
- The doctrines of contribution, subrogation and marshalling; and
- Equitable set-off.
The latter part of the twentieth century saw increased debate over the utility of treating equity as a separate body of law. These debates were labelled the "fusion wars". A particular flashpoint in this debate centred on the concept of unjust enrichment and whether areas of law traditionally regarded as equitable could be rationalised as part of a single body of law known as the law of unjust enrichment.
Origins of the common law
After the Norman Conquest of England in the 11th century, royal justice came to be administered in three central courts: the Court of King's Bench, the Court of Common Pleas, and the Exchequer. The common law developed in these royal courts. To commence litigation in these royal courts, it was necessary to fit one's claim within a form of action. The plaintiff would purchase a writ in the Chancery, the head of which was the Lord Chancellor. If the law provided no remedy (or no efficacious remedy), litigants could sometimes appeal directly to the King. Eventually, the King would delegate resolution of these petitions to the King's Council. These petitions were eventually delegated to the Lord Chancellor himself.
In the early history of the United States, common law was viewed as a birthright. Both the individual states and the federal government supported common law after the American Revolution. U.S. courts draw on decisions of English courts, individual state courts, and federal courts in formulating common law.
Emergence of the Court of Chancery
By the 14th century it appears that Chancery was operating as a court, affording remedies for which the strict procedures of the common law worked injustice or provided no remedy to a deserving plaintiff. Chancellors often had theological and clerical training and were well versed in Roman law and canon law.
By the 15th century the judicial power of Chancery was clearly recognised. Equity, as a body of rules, varied from Chancellor to Chancellor, until the end of the 16th century. After the end of the 17th century, only lawyers were appointed to the office of Chancellor. Over time, Equity developed a system of precedent much like its common-law cousin.
One area in which the Court of Chancery assumed a vital role was the enforcement of uses, a role that the rigid framework of land law could not accommodate. This role gave rise to the basic distinction between legal and equitable interests.
Development of equity in England
It was early provided that, in seeking to remove one who wrongfully entered another's land with force and arms, a person could allege disseisin (dispossession) and demand (and pay for) a writ of entry. That writ gave him the written right to re-enter his own land and established this right under the protection of the Crown if need be, whence its value. In 1253, to prevent judges from inventing new writs, Parliament provided in the Provisions of Oxford that the power to issue writs would thereafter be transferred to judges only one writ at a time, in a "writ for right" package known as a form of action. However, because it was limited to enumerated writs for enumerated rights and wrongs, the writ system sometimes produced unjust results. Thus, even though the King's Bench might have jurisdiction over a case and might have the power to issue the perfect writ, the plaintiff might still not have a case if there was not a single form of action combining them. Therefore, lacking a legal remedy, the plaintiff's only option would be petitioning the King.
People began petitioning the King for relief against unfair judgments of the common law courts. As the number of petitioners rapidly grew, the King delegated the task of hearing petitions to the Lord Chancellor, who was literally the Keeper of the King's Conscience. Since the early Chancellors lacked formal legal training and showed little regard for precedent, their decisions were often widely diverse. In 1529, a lawyer, Sir Thomas More, was appointed as Chancellor, marking the beginning of a new era. After this time, all future Chancellors were lawyers. Beginning around 1557, records of proceedings in the Courts of Chancery were kept and several equitable doctrines developed. Chancery continued to be the subject of extensive criticism, the most famous of which was 17th-century jurist John Selden's aphorism:
Equity is a roguish thing: for law we have a measure, know what to trust to; equity is according to the conscience of him that is Chancellor, and as that is larger or narrower, so is equity. 'Tis all one as if they should make the standard for the measure we call a foot, a Chancellor's foot; what an uncertain measure would this be? One Chancellor has a long foot, another a short foot, a third an indifferent foot: 'tis the same thing in a Chancellor's conscience.
A criticism of Chancery practice as it developed in the early medieval period was that it lacked fixed rules and that the Lord Chancellor was exercising an unbounded discretion. The counter-argument was that Equity mitigated the rigour of the common law by looking to substance rather than to form.
Litigants would go 'jurisdiction shopping' and often would seek an equitable injunction prohibiting the enforcement of a common law court order. The penalty for disobeying an equitable ‘common injunction’ and enforcing a common law judgment was imprisonment.
This tension climaxed in the Earl of Oxford's case (1615) where a judgment of Chief Justice Coke was allegedly obtained by fraud. The Lord Chancellor, Lord Ellesmere, issued a common injunction from the Chancery prohibiting the enforcement of the common law order. The two courts became locked in a stalemate, and the matter was eventually referred to the Attorney-General, Sir Francis Bacon. Sir Francis, by authority of King James I, upheld the use of the common injunction and concluded that in the event of any conflict between the common law and equity, equity would prevail. Equity's primacy in England was later enshrined in the Judicature Acts of the 1870s, which also served to fuse the courts of equity and the common law (although emphatically not the systems themselves) into one unified court system.
Ecclesiastical laws are a branch of English law and were English laws that dealt with matters concerning the church, this was so that religion and law was differentiated. These laws are considered an unwritten law of England and cannot be withheld in the court of law. Ecclesiastical laws are not currently established in the U.S as Common law.
Statute of Uses 1535
In order to avoid paying land taxes and other feudal dues, lawyers developed a primitive form of trust called ‘the use’ that enabled one person (who was not required to pay tax) to hold the legal title of the land for the use of another person. The effect of this trust was that the first person owned the land under the common law, but the second person had a right to use the land under the law of equity.
Henry VIII enacted the Statute of Uses in 1535 (which became effective in 1536) in an attempt to outlaw this practice and recover lost revenue. The Act effectively made the beneficial owner of the land the legal owner and therefore liable for feudal dues.
The response of the lawyers to this Statute was to create the 'use upon a use'. The Statute recognized only the first use, and so land owners were again able to separate the legal and beneficial interests in their land.
Comparison of equity traditions in common law countries
Equity remains a cornerstone of Australian private law. A string of cases in the 1980s saw the High Court of Australia re-affirm the continuing vitality of traditional equitable doctrines. The High Court has recently affirmed the importance of Equity and dismissed the suggestion that unjust enrichment has explanatory power in relation to traditional equitable doctrines such as subrogation.
The state of New South Wales is particularly well known for the strength of its Equity jurisprudence. However, it was only in 1972 with the introduction of reform to the Supreme Court Act 1970 (NSW) that empowered both the Equity and Common Law Division of the Supreme Court of NSW to grant relief in either equity or common law. In 1972 NSW also adopted one of the essential sections of the Judicature reforms, which emphasised that where there was a conflict between the common law and equity, equity would always prevail. Nevertheless, in 1984 three alumni of Sydney Law School and judges of the NSW Supreme Court, Roderick Meagher, William Gummow and John Lehane produced Equity: Doctrines & Remedies. It remains one of the most highly regarded practitioner texts in Australia and England. The work is now in its 5th edition and edited by Dyson Heydon, former Justice of the High Court, Justice Mark Leeming of the New South Wales Court of Appeal, and Dr Peter Turner of Cambridge University.
England and Wales
Equity remains a distinct part of the law of England and Wales. The main challenge to it has come from academic writers working within the law of unjust enrichment. Scholars such as Professor Birks and Professor Burrows argue that in many cases the inclusion of the label "legal" or "equitable" before a substantive rule is often unnecessary. Many English universities, such as Oxford and Cambridge, continue to teach Equity as a standalone subject. Leading practitioner texts include Snell's Equity, Lewin on Trusts, and Hayton & Underhill's Law of Trusts and Trustees.
The courts of Scotland have never recognised a division between the normal common law and equity, and as such the Court of Session (the supreme civil court of Scotland) has exercised an equitable and inherent jurisdiction and called the nobile officium. The nobile officium enables the Court to provide a legal remedy where statute or the common law are silent, and prevent mistakes in procedure or practice that would lead to injustice. The exercise of this power is limited by adherence to precedent, and when legislation or the common law already specify the relevant remedy. Thus, the Court cannot set aside a statutory power, but can deal with situations where the law is silent, or where there is an omission in statute. Such an omission is sometimes termed a casus improvisus.
In India the common law doctrine of equity had traditionally been followed even after it became independent in 1947. However, in 1963 the "Specific Relief Act" was passed by the Parliament of India following the recommendation of the Law Commission of India and repealing the earlier "Specific Relief Act" of 1877. Under the 1963 Act, most equitable concepts were codified and made statutory rights, thereby ending the discretionary role of the courts to grant equitable reliefs. The rights codified under the 1963 Act were as under:
- Recovery of possession of immovable property (ss. 5–8)
- Specific performance of contracts (ss. 9–25)
- Rectification of Instruments (s. 26)
- Recession of Contracts (ss. 27–30)
- Cancellation of Instruments (ss. 31–33)
- Declaratory Decrees (ss. 34–35)
- Injunctions (ss. 36–42)
With this codification, the nature and tenure of the equitable reliefs available earlier have been modified to make them statutory rights and are also required to be pleaded specifically to be enforced. Further to the extent that these equitable reliefs have been codified into rights, they are no longer discretionary upon the courts or as the English law has it, "Chancellor's foot" but instead are enforceable rights subject to the conditions under the 1963 Act being satisfied. Nonetheless, in the event of situations not covered under the 1963 Act, the courts in India continue to exercise their inherent powers in terms of Section 151 of the Code of Civil Procedure, 1908, which applies to all civil courts in India.
There is no such inherent powers with the criminal courts in India except with the High Courts in terms of Section 482 of the Code of Criminal Procedure, 1973. Further, such inherent powers are vested in the Supreme Court of India in terms of Article 142 of the Constitution of India which confers wide powers on the Supreme Court to pass orders "as is necessary for doing complete justice in any cause of matter pending before it".
In modern practice, perhaps the most important distinction between law and equity is the set of remedies each offers. The most common civil remedy a court of law can award is monetary damages. Equity, however, enters injunctions or decrees directing someone either to act or to forbear from acting. Often, this form of relief is in practical terms more valuable to a litigant; for example, a plaintiff whose neighbor will not return his only milk cow, which had wandered onto the neighbor's property, may want that particular cow back, not just its monetary value. However, in general, a litigant cannot obtain equitable relief unless there is "no adequate remedy at law"; that is, a court will not grant an injunction unless monetary damages are an insufficient remedy for the injury in question. Law courts can also enter certain types of immediately enforceable orders, called "writs" (such as a writ of habeas corpus), but they are less flexible and less easily obtained than an injunction.
Another distinction is the unavailability of a jury in equity: the judge is the trier of fact. In the American legal system, the right of jury trial in civil cases tried in federal court is guaranteed by the Seventh Amendment in Suits at common law, cases that traditionally would have been handled by the law courts. The question of whether a case should be determined by a jury depends largely on the type of relief the plaintiff requests. If a plaintiff requests damages in the form of money or certain other forms of relief, such as the return of a specific item of property, the remedy is considered legal, and a jury is available as the fact-finder. On the other hand, if the plaintiff requests an injunction, declaratory judgment, specific performance, modification of contract, or some other non-monetary relief, the claim would usually be one in equity.
Thomas Jefferson explained in 1785 that there are three main limitations on the power of a court of equity: "If the legislature means to enact an injustice, however palpable, the court of Chancery is not the body with whom a correcting power is lodged. That it shall not interpose in any case which does not come within a general description and admit of redress by a general and practicable rule." The US Supreme Court, however, has concluded that courts have wide discretion to fashion relief in cases of equity. The first major statement of this power came in Willard v. Tayloe, 75 U.S. 557 (1869). The Court concluded that "relief is not a matter of absolute right to either party; it is a matter resting in the discretion of the court, to be exercised upon a consideration of all the circumstances of each particular case." Willard v. Tayloe was for many years the leading case in contract law regarding intent and enforcement. as well as equity.
In the United States today, the federal courts and most state courts have merged law and equity in the courts of general jurisdiction, such as county courts. However, the substantive distinction between law and equity has retained its old vitality. This difference is not a mere technicality, because the successful handling of certain law cases is difficult or impossible unless a temporary restraining order (TRO) or preliminary injunction is issued at the outset, to restrain someone from fleeing the jurisdiction taking the only property available to satisfy a judgment, for instance. Furthermore, certain statutes like the Employee Retirement Income Security Act specifically authorize only equitable relief, which forces American courts to analyze in lengthy detail whether the relief demanded in particular cases brought under those statutes would have been available in equity.
Equity courts were widely distrusted in the northeastern United States following the American Revolution. A serious movement for merger of law and equity began in the states in the mid-19th century, when David Dudley Field II convinced New York State to adopt what became known as the Field Code of 1848. The federal courts did not abandon the old law/equity separation until the promulgation of the Federal Rules of Civil Procedure in 1938.
Today three states still have separate courts for law and equity; the most notable is Delaware, whose Court of Chancery is where most cases involving Delaware corporations are decided. However, merger in some states is less than complete; some other states (such as Illinois and New Jersey) have separate divisions for legal and equitable matters in a single court. Virginia had separate law and equity dockets (in the same court) until 2006. Besides corporate law, which developed out of the law of trusts, areas traditionally handled by chancery courts included wills and probate, adoptions and guardianships, and marriage and divorce. Bankruptcy was also historically considered an equitable matter; although bankruptcy in the United States is today a purely federal matter, reserved entirely to the United States Bankruptcy Courts by the enactment of the United States Bankruptcy Code in 1978, bankruptcy courts are still officially considered "courts of equity" and exercise equitable powers under Section 105 of the Bankruptcy Code.
After US courts merged law and equity, American law courts adopted many of the procedures of equity courts. The procedures in a court of equity were much more flexible than the courts at common law. In American practice, certain devices such as joinder, counterclaim, cross-claim and interpleader originated in the courts of equity.
- 'Common law' here is used in its narrow sense, referring to that body of law principally developed in the superior courts of common law: King's Bench and Common Pleas.
- Heydon, JD; Leeming, MJ; Turner, PG (2014). Meagher, Gummow & Lehane's Equity: Doctrine and Remedies. Trusts, Wills and Probate Library (5th ed.). LexisNexis. ISBN 9780409332254.
- McGhee, John, ed. (13 December 2017). Snell's Equity (33rd ed.). Sweet & Maxwell. ISBN 9780414051607.
- There is currently a divergence of opinion between the High Court of Australia and the Supreme Court of England on this point. In Australia, the continuing existence of the equitable jurisdiction to relieve against penalties has been confirmed: Andrews v Australia and New Zealand Banking Group Limited  HCA 30, 247 CLR 205. In England, this view was not adopted: Cavendish Square Holding BV v Talal El Makdessi  UKSC 67.
- Degeling, Simone; Edelman, James, eds. (October 2005). Equity in Commercial Law. Sydney: Lawbook Co. ISBN 0-455-22208-8..
- For an example of the pro-fusionist view, see Andrew Burrows, Burrows, Andrew (1 March 2002), "We Do This At Common Law But That in Equity", Oxford Journal of Legal Studies, 22 (1): 1–16, doi:10.1093/ojls/22.1.1, JSTOR 3600632.
- Birks, Peter (13 January 2005). Unjust Enrichment. Clarendon Law Series (2nd ed.). Oxford University Press. ISBN 9780199276981.
- Burrows, Andrew (2 December 2010). The Law of Restitution (3rd ed.). Oxford University Press. ISBN 9780199296521.
- Virgo, Graham (13 August 2015). The Principles of the Law of Restitution (3rd ed.). Oxford University Press. ISBN 9780198726388.
- "The Origins of Common Law". US Legal, Inc.
- Worthington, Sarah (12 October 2006). Equity. Clarendon Law Series (2nd ed.). Oxford University Press. pp. 10–11. ISBN 0199290504.
- J. Selden, Table Talk; quoted in Evans, Michael; Jack, R Ian, eds. (1984), Sources of English Legal and Constitutional History, Sydney: Butterworths, pp. 223–224, ISBN 0409493821
- Earl of Oxford's Case, I Ch Rep I, 21 ER 485 (Court of Chancery 1615).
- Godwyne v. Profyt in William Paley, Baildon, ed. (1896), Select Cases in Chancery: A.D. 1364 to 1471, Selden Society, case 45 (after 1393).
- See, e.g., Muschinski v Dodds  HCA 78, 160 CLR 583.
- Bofinger v Kingsway  HCA 44.
- Supreme Court Act 1970 (NSW) s 44
- Law Reform (Law and Equity) Act 1972 (NSW) s 5
- Cukurova Finance International Ltd v Alfa Telecom Turkey Ltd  UKPC 20 at para. 20
- Harris v Digital Pulse Pty Ltd  NSWCA 10, 56 NSWLR 298
- Thomson, Stephen (2015). The Nobile Officium: The Extraordinary Equitable Jurisdiction of the Supreme Courts of Scotland. Edinburgh: Avizandum. ISBN 1904968333.
- "Nobile officium used to recognise English High Court orders due to statutory casus improvisus | The Nobile Officium". Archived from the original on 2 Apr 2017. Retrieved 11 May 2017.
- White, J. R. C. (1981). "A Brief Excursion into the Scottish Legal System". Holdsworth Law Review. University of Birmingham. 6 (2): 155–161.
- Jefferson, Thomas (November 1785). "To Philip Mazzei". Letter to Phillip Mazzei.
- Willard v. Tayloe, 75 U.S. 557 (1869).
- Dawson, John P. (January 1984). "Judicial Revision of Frustrated Contracts: The United States". Boston University Law Review. 64 (1): 32.
- "Events Subsequent to the Contract As a Defence to Specific Performance". Columbia Law Review. 16 (5): 411. May 1916. JSTOR 1110409.
- Renner, Shirley (1999). Inflation and the Enforcement of Contracts. New Horizons in Law and Economics. Cheltenham, England: Elgar. p. 20. ISBN 978-1-84064-062-5.
- See, e.g., Sereboff v. Mid Atlantic Medical Services, Inc., 547 US 356 (2006). (Roberts, C.J. for a unanimous court) (reviewing the scope of equitable relief as authorized by the ERISA statute).
- Great-West Life & Annuity Ins. Co. v. Knudson, 534 US 204 (2002).
- Laycock, Douglas (2002). Modern American Remedies: Cases and materials (3rd ed.). Aspen Press. p. 370. ISBN 0735524696.
- Funk, Kellen (2015). "Equity without Chancery: The Fusion of Law and Equity in the Field Code of Civil Procedure, New York 1846–76". Journal of Legal History. 36 (2): 152–191. doi:10.1080/01440365.2015.1047560. SSRN 2600201.
- The other two are Mississippi and Tennessee. Sources that mention four states (i.e., Laycock 2002) generally include Arkansas, which abolished its separate chancery courts as of January 1, 2002. "Circuit Court", Arkansas Judiciary, archived from the original on August 4, 2011, retrieved July 3, 2012.
- Rules of the Supreme Court of Virginia, Rule 3:1; W.H. Bryson, "The Merger of Common-Law and Equity Pleading in Virginia", University of Richmond Law Review 41:77-82 (2006).
- Hawes, Lesley Anne (January–February 2013). "Another Conflict in the Circuits Brewing Over Bankruptcy Court's Equitable Powers Under §105(a)". ABF Journal. Retrieved 18 June 2015.
For a history of equity in England, including the Statute of Uses 1535:
- Cockburn, Tina; Shirley, Melinda (14 November 2011). Equity in a Nutshell. Sydney: Lawbook Co. ISBN 0455228809.
- Cockburn, Tina; Harris, Wendy; Shirley, Melinda (2005). Equity & Trusts. Sydney: LexisNexis Butterworths. ISBN 0409321346.
For a general treatise on Equity, including a historical analysis:
- Worthington, Sarah (12 October 2006). Equity. Clarendon Law Series (2nd ed.). Oxford University Press. ISBN 0199290504.
For a brief outline of the maxims, doctrines and remedies developed under equity:
- Watt, Gary (29 March 2007). Todd & Watt's Cases and Materials on Equity and Trusts (6th ed.). Oxford University Press. ISBN 0199203164.
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- Christopher St. Germain's Doctor and Student (1518), the classic common law text on equity.
- Delaware Court of Chancery: Official site
- Equity and Trusts Hudson, Alastair, 5th edition, Routledge-Cavendish, London, 2007 ISBN 978-0-415-41847-8