This document presents the principles of good practice for public communication responses to mis- and disinformation. The Principles aim to help governments counter mis- and disinformation via the public communication function and other policy responses through strengthening domestic and international media and information ecosystems and reinforcing democracy. This document identifies nine common principles underpinning good practices for how governments can engage with partners across citizens, civil society and the private sector, based on evidence and interventions observed around the world during the COVID-19 pandemic and beyond.