Decisions of the common law courts are appealable to Parliament, which can change the common law by statute.

No attorney may practice law and also be a justice of assize.

Champerty [an outsider supporting or maintaining litigation in which there is an agreement for him to share in the award] is forbidden because court officials have maintained and defended a party which has resulted in another party being cheated out of his land.

Whereas it is contained in the Magna Carta that none shall be imprisoned nor put out of his freehold, nor of his franchises nor free custom, unless it be by the law of the land; it is established that from henceforth none shall be taken by petition or suggestion made to the King unless by indictment of good and lawful people of the same neighborhood where such deeds be done, in due manner, or by process made by writ original at the common law; nor that none be out of his franchise, nor of his freeholds, unless he be duly brought into answer and forejudges of the same by the course of law. (forerunner of indictment grand juries and trial juries for criminal cases)

There were so many cases that were similar to, but not in technical conformity with, the requirements of the common law for a remedy by the reign of Edward III, that litigants were flowing into the Chancery, which had the power to give swift and equitable relief.

The King will fine instead of seize the land of his tenants who sell or alienate their land, such fine to be determined by the Chancellor by due process.

The King's coroner and a murderer who had taken sanctuary in a church often agreed to the penalty of confession and perpetual banishment from the nation as follows: "Memorandum that on July 6, [1347], Henry de Roseye abjured the realm of England before John Bernard, the King's coroner, at the church of Tendale in the County of Kent in form following: 'Hear this, O lord the coroner, that I, Henry de Roseye, have stolen an ox and a cow of the widow of John Welsshe of Retherfeld; and I have stolen eighteen beasts from divers men in the said county. And I acknowledge that I have feloniously killed Roger le Swan in the town of Strete in the hundred of Strete in the rape of Lewes and that I am a felon of the lord King of England. And because I have committed many ill deeds and thefts in his land, I abjure the land of the Lord Edward King of England, and [I acknowledge] that I ought to hasten to the port of Hastings, which thou hast given me, and that I ought not to depart from the way, and if I do so I am willing to be taken as a thief and felon of the lord King, and that at Hastings I will diligently seek passage, and that I will not wait there save for the flood and one ebb if I can have passage; and if I cannot have passage within that period, I will go up to the knees into the sea every day, endeavoring to cross; and unless I can do so within forty days, I will return at once to the church, as a thief and a felon of the lord King, so help me God."

Property damage by a tenant of a London building was assessed in a 1374 case: "John Parker, butcher, was summoned to answer Clement Spray in a plea of trespass, wherein the latter complained that the said John, who had hired a tavern at the corner of St. Martin-le-Grand from him for fifteen months, had committed waste and damage therein, although by the custom of the city no tenant for a term of years was entitled to destroy any portion of the buildings or fixtures let to him. He alleged that the defendant had taken down the doorpost of the tavern and also of the shop, the boarded door of a partition of the tavern, a seat in the tavern, a plastered partition wall, the stone flooring in the chamber, the hearth of the kitchen, and the mantelpiece above it, a partition in the kitchen, two doors and other partitions, of a total value of 21s. four pounds, 1s. 8d., and to his damage, 400s. 20 pounds. The defendant denied the trespass and put himself on the country. Afterwards a jury … found the defendant guilty of the aforesaid trespass to the plaintiff's damage, 40d. Judgment was given for that amount and a fine of 1s. to the King, which the defendant paid immediately in court."

The innkeeper's duty to safeguard the person and property of his lodgers was applied in this case:

"John Trentedeus of Southwark was summoned to answer William Latymer touching a plea why, whereas according to the law and custom of the realm of England, innkeepers who keep a common inn are bound to keep safely by day and by night without reduction or loss men who are passing through the parts where such inns are and lodging their goods within those inns, so that, by default of the innkeepers or their servants, no damage should in any way happen to such their guests …