ESMA, the EU's financial markets regulator, released a briefing for Central Counterparties (CCPs). This briefing gives practical guidelines to National Resolution Authorities (NRAs) on using the write-down and conversion of instruments (WDCI) tool. It aims to help NRAs better prepare for applying WDCI during financial crises. ESMA's initiative promotes consistent practices across the EU to boost financial market stability. The briefing was created by ESMA’s CCP Resolution Committee, offering a comprehensive methodology. NRAs are advised to define data collection requirements for CCPs, focusing on WDCI resource calibration. Stakeholder impact, including clearing members and financial markets, should be considered by NRAs. Processes must be in place to ensure WDCI's effective implementation, including post-application reorganization. This briefing adds to previous ones, contributing to a unified resolution rulebook. This emphasizes practical tool application for NRAs. The goal is to enhance financial stability within the EU's financial markets.