Over the past decade, there has been an increase in the reported cases of betting-motivated corruption (e.g., match-fixing, spot-fixing, and the misuse of inside information) within Australian sport. The increasing visibility of this type of corruption has raised commentary relating to the integrity of sport, both within Australia and internationally. Despite the growing threat to sport's integrity, research around betting-motivated corruption in Australian sport is still in its infancy. Currently, there is a need for research to investigate the application of regulation and anti-corruption concepts from other sectors to the sport context to further understand betting-motivated corruption prevention in Australian sport. To do this, a quantitative survey approach involving athletes and support staff (e.g. coaches, trainers, administrators) from sub-elite Australian rugby league and basketball was conducted over three interconnected studies: Study One explored the knowledge and beliefs of athletes and support staff in relation to the prevalence of betting-motivated corruption within their sport, their reasons for engaging in corruption, what would deter them, and what they believe would best prevent athletes and support staff from engaging in betting-motivated corruption; Study Two applied the Klockars integrity scale and explored attitudes of athletes and support staff towards four different betting-motivated corruption scenarios that could occur within their sport, and their perception of the culture around these unethical behaviours; and Study Three explored the 'code of silence' notion within the betting-motivated corruption context and identified key correlates of athletes' and support staff's reluctance to report, including perceptions of procedural justice and compliance, and the influence of organisational culture. Overall, the research contributes theoretical and practical considerations to inform academia, policymakers, and sport administrators concerned with the prevention of betting-motivated corruption in sport within Australia and internationally.