http://dictionary.law.com confidence game - n. the obtaining of money from others through trick or swindle, generally by gaining the victim's trust and confidence.
conspiracy - n. when people work together by agreement to commit an illegal act. A conspiracy may exist when the parties use legal means to accomplish an illegal result, or to use illegal means to achieve something that in itself is lawful. To prove a conspiracy those involved must have agreed to the plan before all the actions have been taken, or it is just a series of independent illegal acts. A conspiracy can be criminal for planning and carrying out illegal activities, or give rise to a civil lawsuit for damages by someone injured by the conspiracy. Thus, a scheme by a group of salesmen to sell used automobiles as new, could be prosecuted as a crime of fraud and conspiracy, and also allow a purchaser of an auto to sue for damages for the fraud and conspiracy.
false pretenses - n. the crime of knowingly making untrue statements for the purpose of obtaining money or property fraudulently. This can range from claiming zircons are diamonds and turning back the odometer on a car, to falsely stating that a mine has been producing gold when it has not. It is one form of theft.
fraud - n. the intentional use of deceit, a trick or some dishonest means to deprive another of his/her/its money, property or a legal right. A party who has lost something due to fraud is entitled to file a lawsuit for damages against the party acting fraudulently, and the damages may include punitive damages as a punishment or public example due to the malicious nature of the fraud. Quite often there are several persons involved in a scheme to commit fraud and each and all may be liable for the total damages. Inherent in fraud is an unjust advantage over another which injures that person or entity. It includes failing to point out a known mistake in a contract or other writing (such as a deed), or not revealing a fact which he/she has a duty to communicate, such as a survey which shows there are only 10 acres of land being purchased and not 20 as originally understood. Constructive fraud can be proved by a showing of breach of legal duty (like using the trust funds held for another in an investment in one's own business) without direct proof of fraud or fraudulent intent. Extrinsic fraud occurs when deceit is employed to keep someone from exercising a right, such as a fair trial, by hiding evidence or misleading the opposing party in a lawsuit. Since fraud is intended to employ dishonesty to deprive another of money, property or a right, it can also be a crime for which the fraudulent person(s) can be charged, tried and convicted. Borderline overreaching or taking advantage of another's naiveté involving smaller amounts is often overlooked by law enforcement, which suggests the victim seek a "civil remedy" (i.e., sue). However, increasingly fraud, which has victimized a large segment of the public (even in individually small amounts), has become the target of consumer fraud divisions in the offices of district attorneys and attorneys general.