The Carbon Border Adjustment Mechanism (CBAM) is an instrument implemented by the European Union to reduce greenhouse gas emissions and address carbon leakage. It aims to ensure that imported goods are subject to a carbon price equivalent to the carbon price of domestic production in the EU. This eLearning course on CBAM for the EU Member States’ National Competent Authorities (NCA) and customs authorities offers a comprehensive exploration of the Carbon Border Adjustment Mechanism (CBAM) specifically for the authorities that will implement the CBAM.