Precedent is a principle or rule established in a legal case that becomes authoritative to a court or other tribunal when deciding subsequent cases with similar legal issues or facts. The legal doctrine stating that courts should follow precedent is called stare decisis.
Case law, also used interchangeably with common law, is law that is based on precedents, that is the judicial decisions from previous cases, rather than law based on constitutions, statutes, or regulations. Case law uses the detailed facts of a legal case that have been resolved by courts or similar tribunals. These past decisions are called "case law", or precedent. Stare decisis—a Latin phrase meaning "let the decision stand"—is the principle by which judges are bound to such past decisions, drawing on established judicial authority to formulate their positions.
Landmark court decisions, in present-day common law legal systems, establish precedents that determine a significant new legal principle or concept, or otherwise substantially affect the interpretation of existing law. "Leading case" is commonly used in the United Kingdom and other Commonwealth jurisdictions instead of "landmark case", as used in the United States.
Obiter dictum is a Latin phrase meaning "other things said", that is, a remark in a legal opinion that is "said in passing" by any judge or arbitrator. It is a concept derived from English common law, whereby a judgment comprises only two elements: ratio decidendi and obiter dicta. For the purposes of judicial precedent, ratio decidendi is binding, whereas obiter dicta are persuasive only.
Hedley Byrne & Co Ltd v Heller & Partners Ltd [1964] AC 465 is an English tort law case on economic loss in English tort law resulting from a negligent misstatement. Prior to the decision, the notion that a party may owe another a duty of care for statements made in reliance had been rejected, with the only remedy for such losses being in contract law. The House of Lords overruled the previous position, in recognising liability for pure economic loss not arising from a contractual relationship, applying to commercial negligence the principle of "assumption of responsibility".
Ratio decidendi is a Latin phrase meaning "the reason" or "the rationale for the decision". The ratio decidendi is "the point in a case that determines the judgement" or "the principle that the case establishes".
In law, to distinguish a case means a court decides the holding or legal reasoning of a precedent case that will not apply due to materially different facts between the two cases. Two formal constraints constrain the later court: the expressed relevant factors in the ratio of the earlier case must be recited or their equivalent recited or the earlier case makes an exception for their application in the circumstances otherwise it envisages, and the ruling in the later case must not expressly doubt (criticise) the result reached in the precedent case.
Per incuriam, literally translated as "through lack of care" is a device within the common law system of judicial precedent. A finding of per incuriam means that a previous court judgment has failed to pay attention to relevant statutory provision or precedents.
In criminal law, a conspiracy is an agreement between two or more persons to commit a crime at some time in the future. Criminal law in some countries or for some conspiracies may require that at least one overt act be undertaken in furtherance of that agreement, to constitute an offense. There is no limit to the number participating in the conspiracy and, in most countries, the plan itself is the crime, so there is no requirement that any steps have been taken to put the plan into effect. For the purposes of concurrence, the actus reus is a continuing one and parties may join the plot later and incur joint liability and conspiracy can be charged where the co-conspirators have been acquitted or cannot be traced. Finally, repentance by one or more parties does not affect liability but may reduce their sentence.
McPhail v Doulton[1970] UKHL 1, also known as Re Baden's Deed Trusts is a leading English trusts law case by the House of Lords on the certainty of beneficiaries. It held that so long as any given claimant can clearly be determined to be a beneficiary, or not, a trust is valid. The Lords also remanded the case to the Court of Appeal to be decided on this new legal principle as Re Baden's Deed Trusts .
Pepper v Hart [1992] UKHL 3, is a landmark decision of the House of Lords on the use of legislative history in statutory interpretation. The court established the principle that when primary legislation is ambiguous then, in certain circumstances, the court may refer to statements made in the House of Commons or House of Lords in an attempt to interpret the meaning of the legislation. Before this ruling, such an action would have been seen as a breach of parliamentary privilege.
Liversidge v Anderson [1942] AC 206 is a landmark United Kingdom administrative law case which concerned the relationship between the courts and the state, and in particular the assistance that the judiciary should give to the executive in times of national emergency. It concerns civil liberties and the separation of powers. Both the majority and dissenting judgments in the case have been cited as persuasive precedent by various countries of the Commonwealth of Nations. However, in England itself, the courts have gradually retreated from the decision in Liversidge. It has been described as "an example of extreme judicial deference to executive decision-making, best explained by the context of wartime, and it has no authority today." It is therefore mainly notable in England for the dissent of Lord Atkin.
Miliangos v George Frank Ltd, [1976] AC 443 is a leading decision of the House of Lords enforcement of debts. The case created the Miliangos rule that allows creditors under a contract to obtain judgment under a foreign currency. The Lords stated that the date of payment would be the date of conversion to the foreign currency.
Re Spectrum Plus Ltd[2005] UKHL 41 was a UK company law decision of House of Lords that settled a number of outstanding legal issues relating to floating charges and recharacterisation risk under the English common law. However, the House of Lords also discussed the power of the court to make rulings as to the law that were "prospective only" to mitigate potential harshness when issuing a ruling that was different from what the law had previously been understood to be.
The publication of an obscene libel was an offence under the common law of England. Prior to the abolition by section 1 of the Criminal Law Act 1967 of the distinction between felony and misdemeanour, it was regarded as a misdemeanour. It has been abolished in England and Wales and Northern Ireland.
Murphy v Brentwood District Council[1991] UKHL 2, [1991] 1 AC 398 was a judicial decision of the House of Lords in relation to recovery for pure economic loss in tort.
R v Shivpuri [1986] UKHL 2 is a House of Lords case in English law as to whether a criminal attempt which had a "more than merely preparatory act" and mens rea of an inchoate stage but of a crime which transpired to be impossible in its completion – as the actus reus unwittingly related to a lawful, not what the defendant apprehended to be an unlawful substance – amounted to an attempt to commit a crime. The judicial panel, the highest court of England, decided it would amount to the crimes of attempted dealing in and harbouring a controlled drug, with intent to evade the prohibition of importation of the same. In doing so, it overturned its own ruling the year before in Anderton v Ryan, applying the Practice Statement of 1966.
Kimble v. Marvel Entertainment, LLC, 576 U.S. 446 (2015), is a significant decision of the United States Supreme Court for several reasons. One is that the Court turned back a considerable amount of academic criticism of both the patent misuse doctrine as developed by the Supreme Court and the particular legal principle at issue in the case. Another is that the Court firmly rejected efforts to assimilate the patent misuse doctrine to antitrust law and explained in some detail the different policies at work in the two bodies of law. Finally, the majority and dissenting opinions informatively articulate two opposing views of the proper role of the doctrine of stare decisis in US law.
In the English system of common law, judges have devised a number of mechanisms to allow them to cope with precedent decisions.
Anderton v Ryan [1985] is a House of Lords case in English criminal law, on whether an act which would amount to an offence but which by virtue of a misunderstanding of the goods involved was impossible breaks section 1 of the Criminal Attempts Act 1981; the court established against a similar defendant the next year that the reverse should hold true in future.