5 Hardest Countries to Get Citizenship by Naturalization

2. Slovenia

Residency Requirement for naturalization: 10 years

Slovenia also requires a 10-year stay in the country to qualify for citizenship, with the last five years being consecutive. Additionally, the applicant must prove they have sufficient financial means to support themselves, have no criminal record, provide proof of paid taxes, demonstrate that their citizenship does not harm the public, and take an oath to respect the Slovenian constitution. While dual citizenship is recognized, similar to Spain, it is only in select cases. Thus. Slovenia is also one of the hardest countries to get citizenship through naturalization.