Private Client analysis: The Law Debenture Trust Corporation plc v Ukraine is a fascinating and unusual case. As a matter of procedure, it was merely an appeal of a decision not to grant summary judgment over non-payments of Notes, debt instruments in the Eurobond form. However, this took the Supreme Court on lengthy journey through the doctrines of capacity to contract, of apparent and ostensible authority, and of duress; and how all three intertwine with the plane of international law. The international law doctrine of countermeasures also featured. The Supreme Court ultimately held in the majority judgment that:—(1) foreign states recognised by Her Majesty’s government are unlimited in their capacity to contract even where they lacked capacity under their own domestic constitutional processes; (2) the conduct and context of the major institutions of a state can constitute a representation of authority and so bind that state under the doctrine of apparent authority; (3) although breaches of international law cannot themselves constitute duress without first having been incorporated in some way in English domestic law, threat to the person is a part of English law and the threat of invasion by a foreign state is a form of threat to the person and can found a defence of duress; (4) the doctrine of countermeasures was not recognised in English domestic law (Lord Carnwath dissenting). In some respects, this case is sui generis. The most novel part of the judgment, the conclusion on duress in the international context, has only limited future application (or so one hopes). However, the other parts of the judgment are still welcome reassurance for creditors who provide financing to states and their executive bodies, given recent calls by some practitioners and international observers for reform. Written by Piers Digby, barrister at Radcliffe Chambers.