If you were a voter in 2010, as far as I know. But I don't know if it contains foreign home addresses. Some people say that it was fetched from ysk.gov.tr . Normally MERNİS has more detailed database, so they say that it cannot be MERNİS. MERNİS stands for Central Citizenship Administration Center, it contains even pre-Turkish Republic "citizens", like from Ottoman Empire. YSK stands for Supreme Electoral Council. A friend of mine had access to MERNİS, he once said that the leaked data is not directly from MERNİS.