At any given time, any organization could become the victim of a cybersecurity breach. It’s a matter of when—not if—it will happen. The Internet has revolutionized businesses, innovation, and commerce, but it has also evolved into a battlefield where cyberattacks are not merely probable; they are inevitable. For organizations, a mentality change is required from "we will never be breached" to "when a breach happens, how should we respond and to whom?" The emphasis on an honest discussion about disclosure subsequent to a security incident is vital, not just for regulatory compliance, but also for maintaining trust with stakeholders. This chapter will delve into best practices that organizations should adopt for transparent communication postincident. It will also explore common mistakes organizations make out of fear, ignorance, lack of expertise, or unfortunately, arrogance.