Palmer v CITIC Ltd [No 7]

In Palmer v CITIC Ltd [No 7], the Court of Appeal was tasked with examining the application of the Anshun estoppel doctrine in the context of a legal proceeding. The case involved Mr Palmer, who was appealing a decision that had applied the Anshun estoppel to prevent him from raising certain issues in a subsequent proceeding. The central dispute centred around whether 'special circumstances' existed that would permit Mr Palmer to raise these issues despite the doctrine of Anshun estoppel. The legal issues before the Court of Appeal included the scope of the doctrine of Anshun estoppel, the nature and extent of 'special circumstances' that could justify allowing an issue to be raised in a subsequent proceeding, and the discretion of the Court in such matters.

The Court of Appeal delved into the concept of 'special circumstances', as articulated in previous cases such as Wong v Minister for Immigration and Multicultural and Indigenous Affairs. The Court noted that while the doctrine of Anshun estoppel generally prevents a party from raising an issue in a subsequent proceeding if it could have been raised earlier, there are instances where 'special circumstances' might allow for an exception. These circumstances must be exceptional and must justify the non-application of the general principle. The Court also considered whether a House v The King-type discretion, which would allow for an appeal from a decision on Anshun estoppel, could apply in this context. Ultimately, the Court concluded that the discretion to find 'special circumstances' was a factual finding and not subject to the House v The King principle.

The Court of Appeal found that the trial judge had correctly applied the principles of Anshun estoppel and had correctly concluded that no special circumstances existed to permit Mr Palmer to raise the issues in the subsequent proceeding. The Court highlighted that the determination of special circumstances involves a broad range of factors and must be assessed on a case-by-case basis. While the Court acknowledged the appellant's submissions, it upheld the trial judge's decision, finding no basis to interfere with the conclusion that no special circumstances were present. The Court of Appeal thus affirmed the lower court's decision, maintaining that the doctrine of Anshun estoppel would apply unless exceptional circumstances warranted an exception.