Hi from Estonia
Turned out that the Ukrainian COVID-19 vaccination certificates generated via the Diia app are not working properly everywhere.
Here in Tallinn, my QR code was scanned five times, and it did’t work at two restaurants including McDonalds. The waitresses kind of saw the basic info about my vaccination but still their systems were indicating they were not allowed to let me stay in.
Looking forward to seeing whether it will work when I’ll be trying to embark on a ferry to Helsinki later today.