many times, subpoenas are one of the most important puzzle pieces in a legal proceeding. the first step is to fill out the proper forms and obtain the subpoena from the court clerk. you should also make a second copy of the final document; this copy will go to the witness, while you keep the original. your server will need to deliver the subpoena in one of the four legally approved methods. the server cannot leave a subpoena if they are not sure it is in the right hands. be sure to bring the original subpoena form and the proof of service to court, as it may be needed if the witness fails to appear or produce the required documents.