In proceedings commenced by originating summons where evidence is to be by affidavit, a party must first obtain an order under O 58 r 21 (for oral evidence) or a note under O 36 r 13 (authorising subpoena in chambers proceedings) before applying for leave to issue early return subpoenas under O 36 r 12(4). The fact that discovery of particular documents was refused does not preclude a subpoena for those documents provided the subpoena is in proper form. The principles governing leave to issue early return subpoenas include apparent potential relevance, legitimate forensic purpose, case management considerations, and proper form.
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