Yours, Etc.: Origins and Uses of 8 Sign-Offs
A confidence game; swindle; scam (1880s+)
any elaborate swindling operation in which advantage is taken of the confidence the victim reposes in the swindler. Some countries have created a statutory offense of this name, though the elements of the crime have never been clearly defined by legislation, and the scope of proscribed behaviour remains subject to varying interpretations among jurisdictions.