A civil conspiracy is a form of conspiracy involving an agreement between two or more parties to deprive a third party of legal rights or deceive a third party to obtain an illegal objective. A form of collusion, a conspiracy may also refer to a group of people who make an agreement to form a partnership in which each member becomes the agent or partner of every other member and engage in planning or agreeing to commit some act. It is not necessary that the conspirators be involved in all stages of planning or be aware of all details. Any voluntary agreement and some overt act by one conspirator in furtherance of the plan are the main elements necessary to prove a conspiracy.
|Part of the common law series|
|Trespass to the person|
|Principles of negligence|
|Strict and absolute liability|
|Other topics in tort law|
|Other common law areas|
A conspiracy may exist whether legal means are used to accomplish illegal results, or illegal means used to accomplish something legal. "Even when no crime is involved, a civil action for conspiracy may be brought by the persons who were damaged."
In tort law the legal elements necessary to establish a civil conspiracy are substantially the same as for establishing a criminal conspiracy, i.e. there is an agreement between two or more natural persons to break the law at some time in the future or to achieve a lawful aim by unlawful means. The criminal law often requires one of the conspirators to take an overt step to accomplish the illegal act to demonstrate the reality of their intention to break the law, whereas in a civil conspiracy, an overt act towards accomplishing the wrongful goal may not be required. Etymologically, the term comes from Latin con- "with, together", and spirare "to breathe".