The previous Hungarian government collected several hundred billion forints through a carbon dioxide quota tax. However, the European Court of Justice has since ruled this tax invalid. As a result, the current administration under Tisza is now responsible for refunding the collected sums. These repayments must include accumulated interest, significantly increasing the total financial burden. The situation is framed as a strategic maneuver by the previous government to leave a financial liability for its successor. This legal reversal transforms a former revenue stream into a substantial state debt. The case highlights the ongoing tension between national fiscal policies and EU law.