When Slovakia opened citizenship by descent to great-grandchildren on April 1, 2022, one kind of family history was treated as a dead end almost from the start.
The ancestor had left the Kingdom of Hungary before 1908/1910, settled in the United States, and become an American citizen before Czechoslovakia was founded on October 28, 1918. Families with an ancestor like that were told, again and again, that there was nothing to be done.
Naturalization in the United States had cost the emigrant his Hungarian citizenship, and a man who was no longer Hungarian in 1918 could not, the argument went, have become Czechoslovak.
An ancestor’s Czechoslovak citizenship is one of the fundamental requirements for obtaining Slovak citizenship by descent. The Slovak Ministry of the Interior applied the same reasoning when it denied an application that our firm had filed for a client.
On June 24, 2025, the Minister of the Interior set aside that denial, and the Ministry has since changed its practice on ancestors who emigrated before 1908/1910 and naturalized in the US before 1918. Many Slovak-American families still do not know the answer has changed.
Emigration before 1918
Slovak emigration from the Austro-Hungarian Empire to the United States peaked around 1905.
According to the Library of Congress, close to half a million Slovaks emigrated to the United States between 1899 and 1915, and in the interwar years the quota laws reduced that flow to a small fraction.
In most Slovak-American families, the ancestors crossed the Atlantic very early, and many became US citizens before Czechoslovakia was founded in 1918.
So the ancestor who was supposed to close the door is a common figure in Slovak-American family trees. For many families who could qualify for Slovak citizenship, the 2025 decision opened that door.
The 2025 appeal
Our client’s great-grandfather was born in present-day Slovakia. He emigrated to America more than a decade before Czechoslovakia existed and naturalized there before 1918.
The Ministry concluded that he had therefore never been a Czechoslovak citizen and denied the application. We received the denial on March 11, 2025, and appealed on March 26, 2025.
The appeal rested on a legal analysis we had completed in November 2023. Two academic legal historians, one from the Czech Republic and one from Slovakia, neither with any connection to the firm, reviewed it and prepared their own expert opinions in support, which we submitted with the appeal.
The Minister of the Interior decided the appeal on June 24, 2025, on the proposal of his special commission for appeals (reference SL-OLVS-2025/006324-002). He found that our client’s ancestor could still have become a Czechoslovak citizen.
In our translation of the Slovak original, the earlier loss of his Hungarian citizenship “could not constitute an obstacle to the acquisition of Czechoslovak citizenship.” The Minister’s reasons state that he concurred with “the argument of the applicant’s legal representative.”
The file returned to the Ministry, which had to follow the Minister’s legal view, and the Ministry granted our client’s application. The Ministry has since granted dozens of our similar applications on the same reading, which it adopted as its new practice.
Burden of proof
The most immediate change is that a date alone can no longer rule a family out. An ancestor who left after World War II raises no particular question, but one who left in 1903 and became an American citizen before 1918 used to end the conversation. Since 2025, the conversation starts there, with a careful assessment of the case.
The 2025 decision answered the legal question, but every family still has to prove its own case.
The application must show that the ancestor was a Czechoslovak citizen. When the ancestor left before 1918, proving that is the hardest part of the case, and it often rests on circumstantial evidence.
If an application is denied and the denial becomes final, Slovak law bars a new application for two years. For these families, an unprepared first filing can cost those two years.
In 2022, many families from the great wave of emigration assumed that their ancestor had simply become American too early. Since June 24, 2025, that answer no longer holds. The question now is what the evidence can show.
