One of the barriers to boosting the potential of green LNG markets in the EU nowadays is a notable lack of trust in the credibility of explicit environmental claims (green claims) and the misleading sustainability of carbon-neutral LNG products. The problem is a lack of transparency and reliability regarding the level of GHG emitted even those submitted to third-party verification, and the quality of offset by nature-based projects. The carbon neutrality of LNG proceeds from an amount of GHG compensated by carbon credits certified by an organization, deriving from CO2 reduction projects, such as reforestation. The LNG industry faces challenges due to complex and heterogeneous data, from diverse providers, products, units, and operations. Climate-related claims have been shown to be particularly prone to being unclear and ambiguous and to mislead buyers and end-consumers. This leads to significant risks of overestimations and double counting of both avoided/reduced emissions, due to a lack of transparency, accuracy, accountability, and sharing of reliable data with high granularity.