"Based on Articles 10 and 13 of the United Nations Convention against Corruption (UNCAC) as an entry-point and building on recent developments in international human rights and multi-stakeholder initiatives focusing on anticorruption, transparency and openness, this Guide documents the importance of access to information (ATI) at the transnational and national levels to support efforts preventing corruption, showcasing both existing and emerging practices. It presents examples of how proactive disclosure and reactive disclosure of information support anticorruption efforts in terms of prevention and investigation. ATI is at the heart of many international and sector-based initiatives that build on citizens’ participation to improve accountability and increase transparency in public life. The Guide is an abbreviated version of ARTICLE 19’s detailed guide, published in 2022. It presents to all anti-corruption practitioners’ examples and initiatives initiated by States Parties to the UNCAC, international organizations, civil society organizations, and the private sector to promote ATI. It also exhibits how their combined or individual efforts contribute to fighting corruption and increasing transparency." (Introduction)