An Occasional Paper from RUSI on 12 November examines the criminal involvement in some online gambling activities. In 2019, the EU’s supranational risk assessment assigned the online gambling sector its second-highest risk rating. In contrast, the National Risk Assessment in the UK, which is the world’s largest regulated online gambling market by revenue, has consistently ranked online gambling-related risks as ‘low’. The paper explores money laundering and terrorist-financing risks faced by online gambling operators and recommends measures for their mitigation. Given the cross-border nature of online gambling, it says, the paper’s findings and recommendations are intended to be of use in both the UK and other countries that regulate online gambling. The recommendations include for regulators to consider thematic reviews focused on CDD practices and the detection of stolen cards, and for law enforcement agencies and/or financial intelligence units to conduct and publish analysis of typologies based on suspicious activity reports.