Tax Inspectors Without Borders (TIWB) is a joint initiative of the OECD and United Nations Development Programme (UNDP). The OECD has published a report that charts the evolution of the initiative, highlights key milestones and examines the results achieved by TIWB over the past decade. The report also explores how TIWB will continue to innovate and explore opportunities to meet the rising demand for practical, hands-on capacity building from tax administrations worldwide.