The purpose of the implied undertaking and the grant of leave
5 Before an affidavit that has been filed in a proceeding it is read and thereby becomes part of the evidence in that proceeding, it is subject to an implied undertaking. The same undertaking applies to documents produced to the Court pursuant to the compulsory processes of the Court, such as discovery. The rationale for the undertaking has been explained by McMurdo P in Northbuild Construction Pty Ltd v Discovery Beach Project Pty Ltd (No 4) [2009] 1 QCA 345, [2011] Qd R 145 at 150 as follows:
[13] … The public policy considerations behind them are to ensure that, in compelling specified conduct (in this case, the production of documents in proceedings for a freezing order) privacy and confidentiality are not invaded more than is absolutely necessary for the purpose of securing that justice is done … Whilst all parties are expected to comply with court practice, procedure and orders, the implied undertaking is thought to encourage frank and full compliance …
6 An application may be made, however, for a party to be relieved from the implied undertaking.
7 Such an application is to be made in the proceeding in which the undertaking was impliedly given: Holpitt Pty Ltd v Varimu Pty Limited (1991) 29 FCR 576 at 577 per Burchett J. The forum in which the undertaking was given, it is accepted, is "the most appropriate place in which to make such an application" and that forum is "in the best possible position to determine such an application": Transfield Philippines Inc v Pacific Hydro Ltd [2006] VSC 175 at [133] to [134] per Hollingworth J.
8 In order for a party to obtain a release or modification of the implied undertaking, a Court must be satisfied that there are "special circumstances": Holpitt Pty Ltd v Varimu Pty Limited (1991) 29 FCR 576. Burchett J there observed at 578 to 579:
"... As far as the expression "special circumstances" is concerned, it is an expression which is liable to be misunderstood unless care is taken to ask and answer the question, special in relation to what? "Special" is one of those words which derive almost all their meaning from the context ... If all that is required is that, among the great number of cases in the court in which documents have been discovered, this one must evince some special feature which affords a reason for releasing or modifying the undertaking, there will be no difficulty. Circumstances in which there is a legitimate reason why documents discovered in one proceeding should be made available in another will, viewed in this way, be rare. In the ordinary course, the ordinary rule should apply, there being no special circumstance to suggest otherwise. Cf Jess v Scott (1986) 12 FCR 187, where the Full Court was concerned with the construction of O 52, r 15(2), by which leave to file an appeal out of time could be granted "for special reasons" ...
In my opinion, the court's duty, in an application of this kind, is to consider whether the applicant has shown some circumstance which takes the matter out of the ordinary course, according to which production of documents pursuant to an obligation to make discovery involves the implied undertaking to the court; and, if so, whether an exercise of the court's discretion in favour of the application would be in the interests of justice."
9 In Springfield Nominees Pty Ltd v Bridgelands Securities Limited (1992) 38 FCR 217 at 225 Wilcox J gave content to what constituted "special circumstances" when he set out a list of considerations of relevance to an assessment of that requirement, including:
the nature of the document;
the circumstances under which the document came into existence;
the attitude of the author of the document and any prejudice the author may sustain;
whether the document pre-existed litigation or was created for that purpose and therefore expected to enter the public domain;
the nature of the information in the document (and in particular whether it contains personal data or commercially sensitive information);
the circumstances in which the documents came into the hands of the applicant; and
most importantly of all, the likely contribution of the document to achieving justice in other proceedings.
That list, of course, is not exhaustive. It is not "possible or desirable to propound an exhaustive list of the factors that may bear upon the discretion": Cadbury Schweppes Pty Ltd v Amcor Ltd [2008] FCA 398 at [14] per Gordon J. The list of considerations provided by Wilcox J nevertheless provides a "helpful guide": Liberty Funding Pty Ltd v Phoenix Capital Ltd [2005] FCAFC 3 at [32], (2005) 218 ALR 283 at 290 per Branson, Sundberg and Allsop JJ. The reasons for implying an undertaking and the principles to be applied when seeking a release from that undertaking have been summarised in Groves, 'The implied undertaking restricting the use of material obtained during legal proceedings', (2003) 23 Aust Bar Rev 314.