The Digital Green Certificate (DGC) proposed by the European Commission on the basis of facilitating the free movement rights of European Union (EU) citizens will be capable of effectively serving as a COVID-19 passport. In this contribution, we cast doubt on whether the DGC is fit for purpose, highlighting in particular the potential for the DGC to in fact facilitate greater free movement restrictions for a large number of EU citizens, in particular those who have received non- European Medicines Agency (EMA)-approved vaccines such as Sputnik V in compliance with EU law. Under the proposal as amended by the European Parliament, any destination Member State that accepts proof of vaccination “in order to waive restrictions to free movement” must apply the same waiver to any DGC-holder that has received an EMA-approved vaccine and has the option of doing so for vaccines added to the World Health Organization (WHO) Emergency Use Listing; however, such equal treatment is not available for DGC-holders who have received non-EMA/WHO vaccines. While this measure was alleged to be taken on grounds of public health, a convincing public health case has not been put forward. Instead, the DGC proposal as it stands disregards the promise of the internal market and sets the stage for its fragmentation through geopolitics and bilateralism.