Corruption is a major inhibitor to economic growth, discouraging to domestic and foreign investment and destabilizing of governments. Unsurprisingly, international attention has intensified in recent years with global initiatives to counter corruption and address the proceeds of corruption. These have placed requirements upon national governments to increase transparency, reducing opportunities for use of the legitimate legal and financial infrastructure to disguise and move the proceeds of corruption. This paper reviews the boundaries at national and agency level that can create challenges for those agencies tasked with investigating and returning the proceeds of corruption to the countries from which they came. The paper considers the mechanisms that the agencies in a returning country—the UK—have at their disposal and whether national policy changes can affect their focus and operation. Specifically it reviews the role and future of the International Corruption Unit of the National Crime Agency.