Wisconsin Statutes Testimony, Documentary Evidence and Presumptions (Ch. 885 to 891) § 887.25. Witnesses sent to other states

(1) Upon presentation to any judge of a court of record in Wisconsin of the certificate of the judge or the clerk of any foreign court of record, under seal, stating that any person being or residing in Wisconsin is believed to be a necessary witness in any civil action pending in that court, the judge, if satisfied by such proof as the judge shall require that the testimony of the witness is necessary to the trial of the action, shall issue and attach to the certificate a subpoena commanding the witness to appear in the court where the action is pending, at the time and place stated therein, or show cause, before the judge, at a time and place fixed in the subpoena, why the witness should not appear as therein commanded. The judge may refuse to issue a subpoena or may vacate the subpoena after it is issued, if it appear that compliance will cause undue hardship to the witness.

(2) If any person on whom the subpoena has been served, and to whom has been tendered the sum of 10 cents for each mile to be traveled to and from the court, together with the sum of $5 for each day that his or her attendance is required, neglects to attend and testify at the trial, the person shall be punished as for contempt of court unless the subpoena is vacated.

(3) This section shall not apply to any action pending in any state, territory or country whose laws do not contain provisions similar to this section, requiring persons within their borders to attend for the purpose of testifying in any civil or criminal action pending in this state.