Experts on mergers and acquisitions (M&A) view communications as the most important activity to manage during postmerger integration (PMI) efforts. A sound communications strategy is a critical determinant of success, as communication difficulties and failures can cascade through the integration process and undermine the buyer’s effort to create and realize economic and business value. The available PMI literature offers many different suggestions regarding how best to develop and implement a comprehensive communications approach. This technical note summarizes proven best practices that drive winning PMI communications strategies.