Vodafone retro tax case is a retrospective tax case litigated between the Indian government and Vodafone by the Permanent Court of Arbitration housed in the Hague, the Netherlands. The court ruled in favour of Vodafone and India challenged this ruling at Singapore tribunal. The case concerns the retrospective taxation of Vodafone’s acquisition of Hutchinson Telecommunication International’s stocks. The case had passed through the Bombay High Court and the Supreme Court before being taken to the international court under the India- Netherlands Treaty.