Croatia context: Important Disqualifications for Croatian Citizenship by Descent
You may be disqualified from Croatian citizenship by descent if your ancestor:
Disqualification: Your ancestor left Croatia to move to another country within Yugoslavia or former Yugoslavia (Serbia, Bosnia and Herzegovina, Slovenia, Montenegro, Macedonia)
Why: Movement between Yugoslav republics was internal migration, not emigration. The law specifically requires emigration outside of Yugoslavia.
Disqualification: Your ancestor left Croatia after October 8, 1991 (after independence)
Why: The program is specifically for pre-independence emigrants and their descendants. Post-independence emigrants follow different citizenship rules.
Disqualification: Your ancestor returned to live in Croatia after emigrating
Why: Returning to live in Croatia means they were no longer emigrants. The program is for those who permanently settled abroad.
Emigrated on Basis of International Agreement
Disqualification: Your ancestor left Croatia on the basis of an international agreement
Why: Certain population exchanges and organized emigrations under international treaties are excluded from the emigrant citizenship program.
You Are a Croatian Emigrant Who Moved to Another Yugoslav State
Disqualification: If you yourself are a Croatian emigrant who moved to another country within Yugoslavia