The topic of this survey is the process of collective bargaining for mobile workers in six European countries during the COVID-19 pandemic. Your survey responses will be kept confidential and anonymous and will be used only for research purposes related to the research project titled “MOBILEurope: Collective bargaining for mobile workers in Europe under the COVID-19 – cases of frontier, seasonal and migrant workers”. The project coordinator is Coalición Sindical Independiente de Trabajadores de Madrid CSIT UNION PROFESIONAL. The survey will be conducted during April and May 2023 in Spain, Greece, Portugal, Poland (EU member countries) and North Macedonia and Serbia (EU accession countries). Results of the study will be presented in national reports, as well as in the comparative report.