Authentication, in the law of evidence, is the process by which documentary evidence and other physical evidence is proven to be genuine, and not a forgery. Generally, authentication can be shown in one of two ways. First, a witness can testify as to the chain of custody through which the evidence passed from the time of the discovery up until the trial. Second, the evidence can be authenticated by the opinion of an expert witness examining the evidence to determine if it has all of the properties that it would be expected to have if it were authentic.
Law is a system of rules that are created and enforced through social or governmental institutions to regulate behavior. It has been defined both as "the Science of Justice" and "the Art of Justice". Law is a system that regulates and ensures that individuals or a community adhere to the will of the state. State-enforced laws can be made by a collective legislature or by a single legislator, resulting in statutes, by the executive through decrees and regulations, or established by judges through precedent, normally in common law jurisdictions. Private individuals can create legally binding contracts, including arbitration agreements that may elect to accept alternative arbitration to the normal court process. The formation of laws themselves may be influenced by a constitution, written or tacit, and the rights encoded therein. The law shapes politics, economics, history and society in various ways and serves as a mediator of relations between people.
The law of evidence, also known as the rules of evidence, encompasses the rules and legal principles that govern the proof of facts in a legal proceeding. These rules determine what evidence must or must not be considered by the trier of fact in reaching its decision. The trier of fact is a judge in bench trials, or the jury in any cases involving a jury. The law of evidence is also concerned with the quantum (amount), quality, and type of proof needed to prevail in litigation. The rules vary depending upon whether the venue is a criminal court, civil court, or family court, and they vary by jurisdiction.
Documentary evidence is any evidence that is, or can be, introduced at a trial in the form of documents, as distinguished from oral testimony. Documentary evidence is most widely understood to refer to writings on paper, but the term can also apply to any media by which information can be preserved, such as photographs; a medium that needs a mechanical device to be viewed, such as a tape recording or film; and a printed form of digital evidence, such as emails or spreadsheets.
For handwritten documents, any person who has become familiar with the purported author's handwriting prior to the cause of action from which the trial arose can testify that a document is in that handwriting.
Handwriting is the writing done with a writing instrument, such as a pen or pencil, in the hand. Handwriting includes both printing and cursive styles and is separate from formal calligraphy or typeface. Because each person's handwriting is unique and different, it can be used to verify a document's writer. The deterioration of a person's handwriting is also a symptom or result of certain diseases. The inability to produce clear and coherent handwriting is also known as dysgraphia.
There are several kinds of documents which have generally been deemed to be self-authenticating documents. These include commercial labels, newspapers and other periodicals, and official publications of an arm of the government.
A special category of evidence called an ancient document will be deemed authentic if it can be shown to be more than twenty years old, and found in a place and condition that a document of that age would likely be found.
An ancient document, in the law of evidence, refers to both a means of authentication for a piece of documentary evidence, and an exception to the hearsay rule.
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An expert witness, in England, Wales and the United States, is a person whose opinion by virtue of education, training, certification, skills or experience, is accepted by the judge as an expert. The judge may consider the witness's specialized opinion about evidence or about facts before the court within the expert's area of expertise, referred to as an "expert opinion". Expert witnesses may also deliver "expert evidence" within the area of their expertise. Their testimony may be rebutted by testimony from other experts or by other evidence or facts.
A witness is someone who has, who claims to have, or is thought, by someone with authority to compel testimony, to have knowledge relevant to an event or other matter of interest. In law a witness is someone who, either voluntarily or under compulsion, provides testimonial evidence, either oral or written, of what he or she knows or claims to know about the matter before some official authorized to take such testimony.
A deposition in the law of the United States, or examination for discovery in the law of Canada, involves the taking of sworn, out-of-court oral testimony of a witness that may be reduced to a written transcript for later use in court or for discovery purposes. Depositions are commonly used in litigation in the United States and Canada. They are almost always conducted outside court by the lawyers themselves, with no judge present to supervise the examination.
In law and in religion, testimony is a solemn attestation as to the truth of a matter.
A holograph is a document written entirely in the handwriting of the person whose signature it bears. Some countries or local jurisdictions within certain countries give legal standing to specific types of holographic documents, generally waiving requirements that they be witnessed. One of the most important types of such documents are holographic last wills.
Hearsay is the legal term for certain statements—offered as evidence during a trial or hearing for the purpose of attempting to prove the truth of the matter asserted in the statements—that were not made while testifying at the trial or hearing itself. In general, the witness will attempt to make a statement such as, "Sally told me Tom was in town", as opposed to "I saw Tom in town." Hearsay is not allowed as evidence in the United States, unless one of nearly thirty exceptions applies to the particular statement being made.
Daubert v. Merrell Dow Pharmaceuticals, Inc., 509 U.S. 579 (1993), is a United States Supreme Court case determining the standard for admitting expert testimony in federal courts. The Daubert Court held that the enactment of the Federal Rules of Evidence implicitly overturned the Frye standard; the standard that the Court articulated is referred to as the Daubert standard.
A self-authenticating document, under the law of evidence in the United States, is any document that can be admitted into evidence at a trial without proof being submitted to support the claim that the document is what it appears to be. Several categories of documents are deemed to be self-authenticating:
Certified copy of public or business records;
Official publications of government agencies;
Newspaper articles;
Trade inscriptions, such as labels on products;
Acknowledged documents ; and
Commercial paper under the Uniform Commercial Code.
The Confrontation Clause of the Sixth Amendment to the United States Constitution provides that "in all criminal prosecutions, the accused shall enjoy the right…to be confronted with the witnesses against him." Generally, the right is to have a face-to-face confrontation with witnesses who are offering testimonial evidence against the accused in the form of cross-examination during a trial. The Fourteenth Amendment makes the right to confrontation applicable to the states and not just the federal government. The right only applies to criminal prosecutions, not civil cases or other proceedings.
Hearsay evidence is "an out-of-court statement offered to prove the truth of the matter asserted therein." In certain courts, hearsay evidence is inadmissible unless an exception to the Hearsay Rule applies.
The hearsay provisions of the Criminal Justice Act 2003 reformed the common law relating to the admissibility of hearsay evidence in criminal proceedings begun on or after 4 April 2005.
In the law of the United States of America, an objection is a formal protest raised in court during a trial to disallow a witness's testimony or other evidence which would be in violation of the rules of evidence or other procedural law. An objection is typically raised after the opposing party asks a question of the witness, but before the witness can answer, or when the opposing party is about to enter something into evidence. The judge then makes a ruling on whether the objection is "sustained" or "overruled". An attorney may choose to "rephrase" a question that has been objected to, so long as the judge permits it. Lawyers should make an objection before there is an answer to the question.
An ultimate issue in criminal law is a legal issue at stake in the prosecution of a crime for which an expert witness is providing testimony.
A public instrument is any legal instrument recorded with and authenticated by a public office or employee. To carry weight, any such instrument, must be genuine and authentic. Public instruments consequently must bear the name, title, and seal of the official that issued them, and should be written in the presence of witnesses who attested to them.
Melendez-Diaz v. Massachusetts, 557 U.S. 305 (2009), is a United States Supreme Court case in which the Court held that it was a violation of the Sixth Amendment right of confrontation for a prosecutor to submit a chemical drug test report without the testimony of the person who performed the test. While the court ruled that the then-common practice of submitting these reports without testimony was unconstitutional, it also held that so called "notice-and-demand" statutes are constitutional. A state would not violate the Constitution through a "notice-and-demand" statute by both putting the defendant on notice that the prosecution would submit a chemical drug test report without the testimony of the scientist and also giving the defendant sufficient time to raise an objection.
The role of expert witnesses in English law is to give explanations of difficult or technical topics in civil and criminal trials, to assist the fact finding process. The extent to which authorities have been allowed to testify, and on what topics, has been debated, and to this end a variety of criterion have evolved throughout English case law.
William Shakespeare's handwriting is known from six surviving signatures, all of which appear on legal documents — and from three pages of the handwritten manuscript of the play Sir Thomas More.
