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Parties to the Paris Agreement (PA) have agreed on the goal of limiting the increase in global average temperature to well below 2 °C and are pursuing efforts to limit warming to 1.5 °C. Countries’ nationally determined contributions (NDCs) comprise the main framework used to achieve this. In this context, Mozambique′s NDC includes, amongst other actions, increased renewable energy (RE) generation. This article presents the results of the assessment of greenhouse gas (GHG) impacts of the Renewable Energy Feed-in Tariff (REFIT), using the Long-range Energy Alternatives Planning (LEAP) system model, in order to determine its potential contribution to Mozambique′s NDC’s goals and RE targets. Results from this study show that the REFIT regulation can be expected to contribute to reducing 0.34 MtCO2eq (0.6% of the NDC target for the electricity sector) by 2030, compared to a business-as-usual (BAU) scenario. However, the NDC ambition could be enhanced through the REFIT and contribute to reducing 2.54 MtCO2eq (4.3% of the NDC target for the electricity sector) by 2030. The article further discusses the requirements for a robust measuring, reporting, and verification (MRV) system for climate policies, using REFIT as a case study, to facilitate effective tracking of NDC progress and achievement and transparent reporting to the United Nations Framework Convention on Climate Change (UNFCCC).