Arson is a crime of willfully and maliciously setting fire to or charring property. Though the act typically involves buildings, the term arson can also refer to the intentional burning of other things, such as motor vehicles, watercraft, or forests. The crime is typically classified as a felony, with instances involving a greater degree of risk to human life or property carrying a stricter penalty. A common motive for arson is to commit insurance fraud. In such cases, a person destroys their own property by burning it and then lies about the cause in order to collect against their insurance policy.

A person who commits arson is called an arsonist. Arsonists normally use an accelerant (such as gasoline or kerosene) to ignite, propel and directionalize fires, and the detection and identification of ignitable liquid residues (ILRs) is an important part of fire investigations. Pyromania is an impulse control disorder characterized by the pathological setting of fires. Most acts of arson are not committed by pyromaniacs.

Blackmail is an act of coercion using the threat of revealing or publicizing either substantially true or false information about a person or people unless certain demands are met. It is often damaging information and may be revealed to family members or associates rather than to the general public. It may involve using threats of physical, mental or emotional harm, or of criminal prosecution, against the victim or someone close to the victim. It is normally carried out for personal gain, most commonly of position, money, or property.

Blackmail may also be considered a form of extortion. Although the two are generally synonymous, extortion is the taking of personal property by threat of future harm. Blackmail is the use of threat to prevent another from engaging in a lawful occupation and writing libelous letters or letters that provoke a breach of the peace, as well as use of intimidation for purposes of collecting an unpaid debt.

In many jurisdictions, blackmail is a statutory offense, often criminal, carrying punitive sanctions for convicted perpetrators. Blackmail is the name of a statutory offense in the United States, England and Wales, and Australia, and has been used as a convenient way of referring to certain other offenses, but was not a term used in English law until 1968.

Bribery is defined by Black's Law Dictionary as the offering, giving, receiving, or soliciting of any item of value to influence the actions of an official, or other person, in charge of a public or legal duty. With regard to governmental operations, essentially, bribery is "Corrupt solicitation, acceptance, or transfer of value in exchange for official action." Gifts of money or other items of value which are otherwise available to everyone on an equivalent basis, and not for dishonest purposes, is not bribery. Offering a discount or a refund to all purchasers is a legal rebate and is not bribery. For example, it is legal for an employee of a Public Utilities Commission involved in electric rate regulation to accept a rebate on electric service that reduces their cost for electricity, when the rebate is available to other residential electric customers. However, giving a discount specifically to that employee to influence them to look favorably on the electric utility's rate increase applications would be considered bribery.