The portability of social benefits isgaining importance given the increasing share of individualsworking at least part of their life outside their homecountry. Bilateral social security agreements (BSSAs) areconsidered a crucial approach to establishing portability,but the functionality and effectiveness of these agreementshave not yet been investigated; thus, important guidance forpolicy makers in migrant-sending and migrant-receivingcountries is missing. To shed light on how BSSAs work inpractice, this document is part of a series providinginformation and lessons from studies of portability in fourdiverse but comparable migration corridors: Austria-Turkey,Germany-Turkey, Belgium-Morocco, and France-Morocco. Asummary policy paper draws broader conclusions and offersoverarching policy recommendations. This report looksspecifically into the working of the Belgium-Moroccocorridor. Findings suggest that the BSSA is broadly workingwell, with no main substantive issues in the area of pensionportability, except for the non-portability of thenoncontributory top-up pension and issues with widows’pensions in case of divorce and repudiation, and in healthcare, the pending introduction of portable health care forretirees with single pensions from the other country.Process issues around information provision in Morocco andautomation of information exchange are recognized.