18 USC 1343, makes it a Federal crime or offense for anyone to use interstate wire communications facilities in carrying out a scheme to defraud.
A person can be found guilty of that offense only if all of the following facts are proved beyond a reasonable doubt:
First: That the person knowingly and willfully devised a scheme to defraud, or for obtaining money or property by means of false pretenses, representations or promises; and
Second: That the person knowingly transmitted or caused to be transmitted by wire in interstate commerce some sound for the purpose of executing the scheme to defraud.
It is not necessary that the Government prove all of the details concerning the precise nature and purpose of the scheme; or that the material transmitted by wire was itself false or fraudulent; or that the alleged scheme actually succeeded in defrauding anyone; or that the use of interstate wire communications facilities was intended as the specific or exclusive means of accomplishing the alleged fraud.
What must be proved is that the person knowingly and willfully devised or intended to devise a scheme to defraud; and that the use of the interstate wire communications facilities was closely related to the scheme because the person either wired something or caused it to be wired in interstate commerce in an attempt to execute or carry out the scheme.
To "cause" interstate wire facilities to be used is to do an act with knowledge that the use of the wires will follow in the ordinary course of business or where such use can reasonably be foreseen.
Each separate use of the interstate wire facilities in furtherance of a scheme to defraud constitutes a separate offense.