This document defines illegal, unreported, and unregulated (IUU) fishing and summarizes several international agreements and programs aimed at addressing IUU fishing. It discusses the 2009 FAO Agreement on Port State Measures, which aims to prevent IUU-caught fish from entering markets. It also outlines the FAO's Voluntary Guidelines for Flag State Performance and plans for a Global Record of fishing vessels to strengthen monitoring and combat IUU fishing. While these coordinated efforts have made progress, challenges remain in fully strengthening legal frameworks and developing state capacities to effectively monitor fishing activities globally.