The application shall be verified by affidavit, shall be executed in duplicate and shall be accompanied by two certified copies of the indictment returned, or information and affidavit filed, or of the complaint made to the judge of a circuit or general district court or other officer issuing the warrant stating the offense with which the accused is charged, or of the judgment of conviction or of the sentence. The attorney for the Commonwealth, warden or sheriff may also attach such further affidavits and other documents in duplicate as he shall deem proper to be submitted with such application. One copy of the application, with the action of the Governor indicated by endorsement thereon, and one of the certified copies of the indictment, complaint, information, and affidavits, or of the judgment of conviction or of the sentence shall be filed in the office of the Secretary of the Commonwealth, to remain of record in that office. The other copies of all papers shall be forwarded with the Governor’s requisition.