With our project, we aimed to address the issue of alcohol accessibility for minors and contribute to reducing risky and harmful drinking among young people. Our main idea was to use the method of mystery shopping as a tool to check how consistently the law prohibiting alcohol sales to minors is being implemented. Research shows that underage drinking is closely linked to the accessibility of alcohol. By conducting this project, we wanted to gather concrete data from five different countries, compare practices and laws between various European regions, and lay the foundation for long-term changes in this area. Our vision was to equip youth workers and youth leaders with the knowledge and skills they need to effectively work on alcohol prevention in their local communities. Through three main activities – training for youth workers, practical training for youth leaders, and a final seminar – we aimed not only to support the technical implementation of mystery shopping but also to reflect on how to improve laws and practices in the partner countries. Additionally, we wanted to establish solid partnerships with at least five organizations, create a guide for conducting mystery shopping, and prepare a report on the findings that would serve as a basis for further advocacy activities. This project also aimed to strengthen the youth sector as an important player in public health and contribute to improving legislation and practices related to alcohol sales to minors. The project addressed the challenges of restricted substances, particularly alcohol, in Slovenia and other European countries. It focused on alcohol accessibility among minors in Slovenia, Serbia, Croatia, Bosnia and Herzegovina, Lithuania, Norway, and Iceland. The Youth Network No Excuse Slovenia has been conducting mystery shopping since 2012, where minors perform field research to check alcohol accessibility. Over the years, the methodology, impact, and implementation have improved, leading to a growing need to share this method with other countries. This motivated us to design a project that expanded the use of this public health research method to other international organizations working on alcohol-related issues. Testing the implementation of mystery shopping in other countries was also important to see if this research method could be adapted into other cultural spaces and systems. The purpose of the project was to expand this method internationally, in five different countries, while gaining insights into the situation regarding alcohol sales to minors on a broader scale. To achieve this, we set the following goals: - Prepare and implement three activities for youth workers and youth leaders to help them gain knowledge and skills for tackling alcohol-related challenges in their local contexts. - Conduct a round of mystery shopping for alcohol in five countries, with at least five stores per country. - Organize two or more online meetings to evaluate and monitor participants' progress when they are not in Slovenia. - Create a guide for youth workers and youth leaders on conducting mystery shopping for alcohol in partner countries. - Prepare a report on the implementation of mystery shopping for alcohol in six different countries. - Establish partnerships with at least five organizations from different countries that work in the field of youth public health.