Foreword As head of the National Electoral Institute, the institutional body in charge of organizing the elections in Mexico at the federal level and coordinating voting processes at the sub-national level along with local electoral authorities, it is clear to me that Elections Investigations Guidebook is a work that fills a gap that long ago needed to be filled. It also makes an essential contribution to help improving practices and standards on elections investigations and electoral disputes, which will undoubtedly contribute to strengthening electoral integrity around the world. Lorenzo Córdova Vianello President of the National Electoral Institute, Mexico. 9