The Parchemins project, associated with the LIVES Centre, aims to assess the impact of regularisation on the undocumented migrants’ population in Geneva, particularly in terms of health and well-being. This project, which is a first in Europe, is linked to the Opération Papyrus, which granted work permits to more than 2,000 people between 2017 and 2018. Of the 4 waves of data collection planned, the first two have been completed.