BY v. Generalstaatsanwaltschaft Berlin, Case C-398/19, CJEU (Grand Chamber), 17 December 2020

Extradition. Citizenship of the European Union. Differentiated treatment depending on when citizenship was acquired. Prohibition of discrimination. 

Art. 18 TFEU
Art. 21 TFEU

Arts. 18 and 21 TFEU must be interpreted as being applicable to the situation of a citizen of the European Union who is a national of one Member State, residing in the territory of another Member State and who is the subject of an extradition request sent to the latter Member State by a third State, even where that citizen moved the centre of his or her interests to that other Member State at a time when he or she did not have Union citizenship.