Poland does not grant citizenship to descendants. It confirms that you already have it. The procedure is called potwierdzenie posiadania obywatelstwa polskiego, and the voivode (the regional governor) decides it on paper, based on documents. If the paper trail holds, the decision follows. If one link is missing, the file stalls, sometimes for a year.
We are genealogists, not lawyers. Our part is the paper trail: finding the records in Polish archives, ordering certified copies and putting them in an order a clerk can follow.
Who can usually apply
Polish citizenship passes from parent to child. Before 19 January 1951 it passed from the father if the parents were married, or from the mother if they were not. After that date either parent counts.
In practice the line starts with an ancestor who was a Polish citizen after the state was re-established, which for most families means someone who lived in Poland after 1920. Departure dates are clues, not a decision on citizenship. Historical domicile, citizenship acquisition and loss rules, and the evidence for each generation require individual assessment.
The question that decides most cases
Did your ancestor lose Polish citizenship before passing it on?
Under the 1920 citizenship act a Pole lost citizenship by taking another country's citizenship, or by serving in a foreign army or office without permission. Many emigrants to the United States, Canada or Argentina naturalised there in the 1930s and 1940s, so this is where most applications are won or lost. There was an important exception for men of military age, which is why the exact dates matter: when he naturalised, how old he was, and what his military status was in Poland at the time.
We cannot rule on that. We can find the naturalisation file, the Polish military records and the passport registers that let a lawyer or the voivode answer it.
The documents a file usually needs
- Your own birth certificate, and marriage certificate if your name changed.
- Birth and marriage certificates for every generation between you and the Polish ancestor.
- Proof that the ancestor was a Polish citizen: a Polish passport, an ID card, a military book (ksiฤ ลผeczka wojskowa), a voter list, a registration card from the population register, or a consular registration abroad.
- Records showing what happened after emigration: naturalisation papers or a certificate that there are none, a foreign army record, census entries.
- Sworn Polish translations of every foreign document.
Polish certificates are issued as full copies (odpis zupeลny) by the civil registry office (USC) that holds the entry. Older entries, generally over 100 years for births, have been handed over to the state archives, and those come as archival copies instead.
Where the records are
Civil registry offices (USC). Births from the last 100 years, marriages and deaths from the last 80. Access depends on statutory entitlement, legal interest or an authorised representative. The office may require proof of relationship and a power of attorney.
State archives. The older registers, plus population books, address registration cards, court files and the files of district offices that issued passports. Which archive depends on the town, and for the eastern borderlands the answer may be outside Poland.
Central Military Archive and the Institute of National Remembrance. Military service records and files from the war and post-war period, which are often the best proof of citizenship for men.
Archives abroad. For families from Lwรณw, Wilno or Grodno, part of the trail is in Ukraine, Lithuania or Belarus. For emigrants, the naturalisation file sits in the country they settled in.
How we work on a citizenship file
We start with a free assessment. You send what the family has: names, the town, any old passport, a photo of a document nobody can read. We tell you which records should exist, where, and whether anything you mentioned points to a possible loss of citizenship.
Then we search and order. A typical Polish file takes us two to four months, mostly because registry offices and archives answer by post. You get scans of everything as it arrives and, at the end, the certified documents, translations and a one-page summary of the line, generation by generation.
If the file needs a legal opinion, we say so before you spend money on it, and we can work with your lawyer.
Common questions
My great-grandfather was born in Poland. Is that enough?
Not by itself. What matters is whether he held Polish citizenship after 1920 and kept it until the next generation was born. Leaving before the First World War does not by itself settle whether Polish citizenship was later acquired. Historical legal status and domicile require individual assessment.
I only know the village name, and the spelling looks wrong.
That is normal. Names were written down by American or Canadian clerks, and places changed names after 1945. We match old spellings against gazetteers and parish lists, and usually find the right place within a few days.
How long does the voivode take?
The administrative code sets one month, or two in complicated cases. In practice many files take a year or more, especially in Warsaw. A complete, well-ordered file is the one thing that helps.
Ready to check your line? Send us what you know through the contact form. The assessment costs nothing.
Read more about research in Poland and the citizenship documents we prepare.
Official sources and scope
- Polish Ministry of the Interior: confirmation of citizenship
- Polish consular guidance: documents for confirmation
Editorial review: 14 October 2026. This is a guide to document research, not a determination of eligibility. Confirm the current procedure and checklist with the competent authority before committing to an application.