In 2012, the applicant received a guarantee that he would receive Croatian citizenship if he would renounce his UK nationality, and he proceeded with the renunciation. In 2013, criminal proceedings against the applicant were initiated, and his naturalisation application was thus postponed and subsequently, after the criminal conviction, rejected - leaving him stateless. The Court ruled against the applicant, finding that naturalisation is a discretionary power of the state and not a right of an individual, and that all the naturalisation requirements, including renunciation of previous nationality and lack of criminal record, need to be met cumulatively for a successful naturalisation.
The applicant was born in Yugoslavia on the territory of Croatia, to parents who were born on the territory of Bosnia and Herzegovina. The applicant's birth registration erroneously included an entry "Muslim", which was subsequently crossed out and replaced by a reference to his origin from Bosnia and Herzegovina. The applicant argued that he should have been registered as a Croatian national at birth, just like his brother was, and that denial of Croatian nationality status would mean that he became stateless after the dissolution of Yugoslavia.
The applicant was born in 1984 in the Republic of Croatia and her birth was registered, but she never acquired citizenship. The case concerns her subsequent acquisition of citizenship as a stateless person with permanent residence.