It is usually assumed that budget support is more vulnerable to corruption than other forms of aid, as it can be directly affected by existing weaknesses in the recipient countries’ public finance management (PFM) systems. While donors usually do not consider corruption as a prohibitive factor to the provision of budget support, there is a broad consensus that diagnostic corruption information needs to be integrated into decisions on budget support operations. This is usually done in the form of ex-ante fiduciary risks assessments. Although most of these fiduciary risk assessment tools do not comprehensively capture corruption risks, it is usually considered that conducting such assessments has a positive impact on the recipient countries’ PFM systems and reform programs.