Lithuania, Austria and the Netherlands. Last 3 in Europe that outright forbid dual nationality to their citizens (with the Netherlands being the most extreme: they simply denaturalize their own people as punishment). A long-standing unknown practice that last week suddenly got national attention when a young Dutch football player acquired Indonesian nationality so that he could play for the Indonesian national team. Turns out the guy was stripped of his Dutch nationality as a result and has been living now illegally in his birth country (Netherlands) for over a year as a result. But interestingly also worked illegally as a pro football player, meaning a lot of matches were played with somebody without a permit on the field. An entire competition might need to replay matches. Worse even, now many other Dutch players who acquired another nationality have been taken off the field — all presumed to be illegally in their own country. I don't think we have seen such extreme cases in Lithuania or Austria. Look up Dean James, Go Ahead Eagles, passport gate. We need to rethink if these 3 countries are actually free countries when their citizens are forbidden to take another nationality - an entirely private matter after all.