Submissions and consideration
11 The plaintiff submitted (and it was not disputed by the first and second defendants) that when challenged by the person served with a subpoena, the party seeking production must state clearly and precisely the legitimate forensic purpose for which the subpoena was issued: Carroll v Attorney General for New South Wales (1993) 70 A Crim R 162. He submitted that it must be shown that it is "on the cards" that the documents will materially assist the applicant's case: Alistair v The Queen (1984) 154 CLR 404 at 414. The plaintiff submitted that these propositions represented trite law and had been applied in many cases: R v Saleam (1999) 16 NSWLR 14, Attorney General for NSW v Dylan Chidgey [2008] NSWCA 65 at [63].
12 The plaintiff submitted that there was no rule of law or practice which limited the production of material or access by a party to material that is relevant because it may be used to impugn the credit of a Crown witness. The plaintiff submitted that there was nothing in Attorney General for New South Wales v Stuart or Aldred v European Hire Cars Pty Limited & Ors, the cases to which his Honour referred, which would support the proposition apparently relied upon by his Honour in refusing to allow production of the documents relating to Susan Brock. Put bluntly, the plaintiff submitted that his Honour was mistaken as to the law on this issue.
13 The plaintiff submitted that in view of his Honour's clear error of law, the matter should be referred back to the Local Court so that the question of the production of the documents, referred to in the subpoena as relating to Susan Brock, can be decided according to law.
14 The first and second defendants accepted that the appeal does raise a question of law. At least implicitly, they accepted that his Honour's decision not to require production of those documents relating to Susan Brock involved a misunderstanding of the decisions in Stuart and Aldred. Nevertheless, they submitted that leave to appeal should not be granted and that if leave is granted, his Honour's decision was correct in any event for the reasons which they set out in support of their notice of contention.
15 On the leave question they submitted that courts are usually loathe to permit satellite litigation of this kind. Reliance was placed on the remarks of Young JA in Commissioner of Police v Hughes [2009] NSWCA 306 at [35]. They submitted that this case was not an appropriate vehicle for determining any general point of law or practice and that there was no evidence that without the production of this material any subsequent trial of the plaintiff would be unfair.
16 I am of the opinion that leave should be granted. It is not in dispute that his Honour's decision not to require production of those documents relating to Susan Brock was based on a wrong understanding of the law. The rule of law upon which his Honour appeared to rely does not exist. The decisions of Stuart and Aldred do not support such a rule of law. It follows that when considering this question his Honour did not apply correct legal principle.
17 The law on this issue was succinctly and, with respect, accurately summarised by Brereton J in Liristis v Gadelrabb [2009] NSWSC 441 at [5] where his Honour said:
"5. I do not understand it ever to have been a proper objection to a subpoena that it seeks documents relating only to credit. Indeed, one of the fundamental distinctions between the processes of subpoenas for production and discovery is that subpoenas, unlike discovery, may be used to obtain documents relevant only to questions of credit, for the purpose of assisting cross-examination as to credit."