The most common cases in the Court of Common Pleas were detinue, "debt" [for money due from a sale, for money loaned, for rent upon a lease for years, from a surety, promised in a sealed document, or due to arbitrators to whom a dispute had been submitted] and "account" [e.g. against bailiffs of manors, a guardian in socage, and partners]. It also heard estovers [right to use during a lease] of wood, profit by gathering nuts, acorns, and other fruits in wood, corody [allowance of food], yearly delivery of grain, toll, tunnage, passage, keeping of parks, woods, forests, chases, warrens, gates, and other bailiwicks, and offices in fee.
The itinerant justices gradually ceased to perform administrative duties on their journeys because landed society had objected to their intrusiveness. Edward I substituted regular visitations of Justices of Assize for the irregular journeys of the itinerant justices. Each one of four circuits had two Justices of Assize. From about 1299, these Justices of Assize heard cases of gaol delivery. Their jurisdiction expanded to include serious criminal cases and breach of the king's peace. One woman was indicted to every 9 men. 16% of the women who were indicted were convicted compared to 30% of the men.
Breaches of the forest charter laws were determined by justices of the King's forest, parks, and chases, along with men of assize.
Coroners' inquest procedures were delineated by statute and included describing in detail in the coroner's rolls every wound of a dead body, how many may be culpable, and people claiming to have found treasure who might be suspects.
The precedent for punishment for treason was established by the conviction of a knight, David ab Gruffydd, who had turned traitor to the Welsh enemy, after fighting with Edward and being rewarded with land, during the conquest of Wales. He had plotted to kill the King. He was found guilty of treason by Parliament and condemned to be dragged at the heels of horses for being a traitor to his knightly vows, hanged by the neck for his murders, cut down before consciousness left him to have his entrails cut out for committing his crimes during the holy week of Easter, and his head cut off and his body divided into four parts for plotting against the King's life. The head was placed on the Tower of London and his body sections were placed in public view at various other locations in England. This came to be known as "hanging, drawing, and quartering". Prior to this the penalty had usually been imprisonment followed by ransom. The penalty for a woman of treason, e.g. killing her husband, who was her lord, was burning at the stake.
Trial by combat is now limited to certain claims of enfeoffment of large land holding and is barred for land held in socage, burgage, or by marriage. (Trial by combat eventually fell into disuse, but was not abolished until 1819.) Assize is the usual manner of trial, but compurgation remains in the borough court long after it becomes obsolete in the royal courts. It came to be that defendants no longer request assizes but are automatically put to them.
Numerous statutes protect the integrity of the courts and King's offices by double and treble damages and imprisonment for offenses such as bribery, false informers, conspiracy to falsely move or maintain pleas, champerty [covenant between a litigant and another for the other to have a part or profit in the award in return for maintaining the suit], conflict of interest by court officers taking part in a quarrel pending in court or working any fraud whereby common right may be delayed or disturbed. There had been many abuses, the most common of which was extortion by sheriffs, who gaoled people without cause to make them pay to be released. The 1275 prohibition of maintenance of a quarrel of a party in court by a nonparty was extended in 1327 to all persons, including the king's councilors and ministers, and great men, e.g. by sending letters. In 1346, this prohibition specifically included prelates, earls, barons taking in hand quarrels other than their own, or maintaining them for gift, promise, amity, favor, doubt, or fear, in disturbance of law and hindrance of right. The reason given was that there had been persons disinherited, delayed or disturbed in their rights, and not guilty persons convicted or otherwise oppressed. All great men were required to put out of their service all maintainers who had been retained, and void their fees and robes, without giving them aid, favor, or comfort. This law was not obeyed.
The king reserved to himself and his council in its judicial capacity the correction of all breaches of the law which the lower courts had failed to remedy, whether from weakness, partiality, corruption, or jury timidity, and especially when the powerful barons defied the courts. The Chancery also sought to address causes which were impeded in their regular course, which often involved assaults, batteries, and forcible dispossessions.
Disputes within the royal household were administered by the King's steward. He received and determined complaints about acts or breaches of the peace within twelve miles around the King's person or "verge". He was assisted by the marshall in the "court of the hall" and by the clerk of the market when imposing fines for trading regulation violations in the "court of the market".
Ecclesiastical courts were successful in their competition with the secular courts for jurisdiction over testamentary matters [concerning wills] and intestate succession [no will] to chattels.