Polish citizenship by descent: how confirmation of citizenship works

If a parent, grandparent or great-grandparent was a Polish citizen, you may already be a Polish citizen yourself without knowing it. Polish law does not "grant" citizenship in these cases: it confirms that it has passed down through the generations. This guide explains who qualifies, how citizenship was lost in the past, which documents matter, how the procedure works and where cases run into difficulty. If you would like the case assessed, see Polish citizenship by descent: how I can help.

Key legislation: Act of 2 April 2009 on Polish citizenship, in particular art. 55; earlier citizenship acts of 1920, 1951 and 1962; Code of Administrative Procedure (Kodeks postępowania administracyjnego).

Descent, not application

Polish citizenship passes primarily by descent, on the principle of ius sanguinis: what matters is whether a parent held Polish citizenship. The principle of ius soli, place of birth, plays only a supporting role in Polish law and applies mainly to children found in Poland whose citizenship cannot be established.

This is why the procedure is called confirmation of possession of Polish citizenship (potwierdzenie posiadania obywatelstwa polskiego). The decision states what is already the case rather than creating a new status. It is different from two other routes:

• Granting of citizenship by the President of Poland, which is discretionary,
• Restoration of citizenship by the Minister of the Interior, for people who lost it in defined historical circumstances.

The date that starts most cases: 31 January 1920

The first Polish Citizenship Act entered into force on 31 January 1920. It granted Polish citizenship by operation of law to people settled in the territory of the newly established Polish State, regardless of nationality, religion, age or gender.

That matters for a great many families: an ancestor did not need to apply for Polish citizenship or identify as ethnically Polish. Living in the relevant territory at the relevant time was enough. Many people who emigrated in the following years held Polish citizenship without ever knowing it, and passed it to their children.

In broad terms, a case is worth examining if an ancestor in the direct line:

• was born in Poland or lived there after January 1920, and
• did not lose Polish citizenship during their lifetime, and
• the chain of descent to you can be evidenced.

There is no fixed generation limit. Cases based on great-grandparents are common; what decides them is the evidence, not the distance.

The rule that decides most cases

For establishing whether citizenship was acquired or lost, the decisive law is the one in force at the time of the event. Four acts matter in practice: those of 1920, 1951, 1962 and 2009.

That single rule explains why two families with seemingly similar histories get different answers. What happened in an ancestor's life, and when, determines which statute applies to it. The analysis therefore has to follow the whole chain, generation by generation, not just the earliest Polish ancestor.

How citizenship was lost, often without anyone noticing

Polish law was restrictive about dual nationality for most of the twentieth century, and citizenship could be lost without the person being informed. Under the successive acts, the events that most often caused loss were:

• acquiring the citizenship of another country, which is the most common single reason,
• entering foreign military service without the consent of the Polish authorities,
• accepting public office abroad without the required consent,
• for women, marriage to a foreign national under the older acts.

Whether a particular event caused loss depends on the law in force when it happened, so the same fact can have different consequences in 1935 and in 1965. Wartime situations are treated with particular care in Polish case law, and service in allied forces during the Second World War is assessed differently from ordinary foreign military service.

The practical consequence: the date an ancestor naturalised abroad is often the single most important fact in the whole case, because it determines whether citizenship was still held when the next generation was born.

Which authority decides

Under art. 55(1) of the Act on Polish citizenship, the decision is issued by the voivode for the place of residence, or the last place of residence in Poland, of the person the proceedings concern. Where there is no such basis, and this is the usual situation for descendants born abroad, the competent authority is the Mazovian Voivode in Warsaw.

People living abroad can file through the Polish consul for their place of residence. Proceedings can also be started by the authority of its own motion.

Documents that support an application

The application covers the person concerned and their ascendants up to the second degree, together with the circumstances needed to establish the facts. Useful documents include:

• Polish identity documents: identity cards, passports, residence or military records, even long expired,
• Polish civil status records: birth, marriage and death certificates issued by a Polish registry office,
• extracts from church registers, which often survive where civil records were destroyed,
• certificates and extracts from Polish state archives,
• foreign civil status records and naturalisation files from the country of settlement,
• ship manifests, census entries and immigration records showing when an ancestor left Poland.

Foreign documents must be translated into Polish by a sworn translator or a Polish consul.

Fees: 277 PLN for the decision confirming possession or loss of citizenship, and 17 PLN for a power of attorney, though a spouse, parent, child or sibling is exempt from that fee. If the decision is negative or the proceedings are discontinued, the stamp duty can be reclaimed.

Time: the voivode has 6 months to issue a decision, and periods of waiting for documents or for steps that depend on the applicant are not counted towards that time. In practice, cases requiring archive research commonly run to about a year.

Where cases get complicated

• Missing records. Polish civil status records were destroyed on a large scale during the war. Where a record is missing, the search moves to state archives, church registers and foreign records.
• Name changes. Spelling was often changed on emigration, which breaks the documentary chain unless the change can be evidenced.
• Dates that cannot be established. If the date of an event cannot be fixed, it may be impossible to say which statute applied to it.
• Women's citizenship. Under the older acts, marriage could affect a woman's citizenship, which matters when descent runs through the maternal line.

If the decision is negative

An appeal goes to the Minister of the Interior and Administration, through the voivode who issued the decision, within 14 days of the decision being served. Only the applicant or their attorney can file it. A further complaint to the administrative court is possible after the appeal stage.

Refusals often turn on gaps in evidence rather than on the substance of the family history: a missing record, an ancestor who cannot be linked to the next generation, or an event whose date cannot be established. Reviewing the reasons carefully matters, because the same case can succeed once the gap is filled.

After a positive decision

Confirmation is not the last step. What usually follows:

1. Transcription of foreign civil status records into the Polish register (umiejscowienie), which is needed before a passport can be issued,
2. A PESEL number, the Polish identification number used by offices, banks and employers,
3. A Polish passport or identity card, applied for at a consulate or in Poland,
4. Other family members, whose own cases are often easier once a chain has been confirmed.

Practical first steps

1. Write down the chain: who the Polish ancestor was, when they were born, when they left Poland and where they settled.
2. Collect what the family already holds: passports, identity cards, military papers, letters, photographs of documents.
3. Order foreign civil status records in the country of settlement, with certified translations into Polish.
4. Find the naturalisation date of the emigrating ancestor, because it often decides the case.
5. Check for Polish records at the registry office for the place of birth or marriage, and at the state archives.
6. Assess the chain before filing, since it is the gaps rather than the ancestry that usually decide the outcome.

Frequently asked questions

Do I have to speak Polish? No. There is no language requirement in confirmation proceedings, because the procedure establishes an existing status rather than granting citizenship. Documents in other languages need certified translations into Polish.

Do I have to give up my current citizenship? Polish law does not require it. Whether your other country allows dual citizenship is a question for that country's law. Polish citizens also buy property in Poland without the permit that other foreigners often need.

How far back can descent be traced? There is no fixed generation limit. What matters is whether the chain of citizenship was preserved and can be evidenced, which is why cases usually turn on documents rather than on how distant the ancestor is.

Does foreign military service always mean citizenship was lost? No. It depends on the period, the force concerned and the law in force at the time, and Polish case law treats some wartime situations differently from ordinary foreign service.

Can I apply from abroad? Yes. The application can be filed through the Polish consul for your place of residence, or by an attorney acting under a power of attorney in Poland.

What is the difference between confirmation and restoration? Confirmation states that citizenship has been held continuously. Restoration applies to people who lost Polish citizenship in defined circumstances and is decided by the Minister of the Interior.

Legal position: September 2026. This article is for information and does not replace legal advice in an individual case.

Contact: +48 509 831 745 or the contact form.