Laws around the world do not attach the same consequence to the lack of use of a trademark, and courts do not always assess in the same way whether a trademark is genuinely used. This is a fundamental issue for trademark owners since, depending on the jurisdiction, lack of genuine use can lead to the refusal of trademark registration, the revocation of trademark rights, or prevent the owner of a non-used trademark from initiating an action based on its trademark. This detailed analysis provides clarity, insight, and guidance on the legal issues and practical implications of genuine use of trademarks in twenty-six jurisdictions worldwide. This book was developed within the framework of the International Association for the Protection of Intellectual Property (AIPPI), a non-affiliated, non-profit organization dedicated to improving and promoting the protection of intellectual property at both national and international levels. This topic was the subject of an AIPPI study, and its subsequent Resolution – (2011, Hyderabad) – which aims to harmonize this issue of genuine use of trademarks. The authors of the chapters for each jurisdiction were carefully selected based on their extensive experience and in-depth knowledge of trademark protection in their respective jurisdictions. Each chapter considers issues and topics such as the following: As a comparative law study and a collection of contributions from around the world on a key issue of trademark law, this book is of tremendous practical interest. Trademark owners, parties involved in or contemplating enforcement proceedings, and interested legal practitioners will benefit greatly from its thorough comparative analysis and guidance. It is also exceptionally valuable as a comprehensive resource for academics and researchers interested in the international harmonization of trademark law.