This report contains ideas, insights and inspiration on four key topics in anti-corruption Collective Action:

• Engaging: How to engage stakeholders in new or expanding Collective Action initiatives
• Building: How to develop a strong and successful initiative that achieves its goals in integrity, anti-corruption and compliance
• Sustaining: How to ensure a Collective Action initiative is set up to survive and thrive
• Measuring: How to evaluate the impact and effectiveness of Collective Action

The report and related online resource results from the 2020 Integrity Partners workshop series, hosted by the Basel Institute on Governance in August 2020 with the support of the Siemens Integrity Initiative.