Questão jurídica principal
Whether the former Switzerland-Yugoslavia social security agreement still applied to a Kosovo national who claimed Serbian nationality.
Decisão extraída
The agreement no longer applied to Kosovo nationals from 1 April 2010; the respondent was treated as a Kosovo citizen only.
Fundamentação extraída
The alleged Serbian nationality was raised late and insufficiently proved. There is no presumption that Kosovo nationals are also Serbian nationals; a valid proof of Serbian citizenship was required.