This thesis investigates the implementation of the Recovery and Resilience Facility in Sweden and Latvia, to examine if the implementation has enhanced EU´s legitimacy. Applying a case study methodology, the study conducts a process-tracing approach and collects data from primary sources of national and EU documents. This methodology explores the practical implementation of the instrument towards a green transition, which thenceforth is analysed through the theory of legitimacy.   The thesis is based upon the questions: How has the Recovery and Resilience Facility been implemented by Sweden respective Latvia to support the development towards a green transition?   Has the RRF and its implementation enhanced EU´s legitimacy?   The findings conclude that the instrument has enhanced EU´s legitimacy. Despite ambiguous outcomes in the implementations, the member states interests are adopted. As a result, an advancement of constitutional settlements has led to a further interconnected relationship between the EU and member states. In times of crisis, a coordination of solidary responsibilities is significant, which the EU manages well according to the results.