I believe you mean subpeona. It is when you are served to appear in court.
In order to subpoena a contract you need to have a lawyer. The lawyer will then have the judge sign off on the subpoena, requiring the use of the contract for a case.
To stop a subpoena, the person must obtain a subpoena motion form from the courthouse. The form must be filled out with the reason the subpoena should be quashed. The motion should be filed with the clerk's office and a copy should be sent to the plaintiff's attorney by certified mail.