Polish Citizenship by Descent: A Guide for British Citizens

Many British people with a Polish parent or grandparent may already be Polish citizens without knowing it. Polish citizenship passes by descent, so if the line was never broken, you do not apply to become Polish: you ask the Polish state to confirm that you already are. This is called potwierdzenie posiadania obywatelstwa polskiego, confirmation of possession of Polish citizenship.

The decision is made by a voivode (provincial governor), in most UK cases the Mazowieckie Voivode in Warsaw. From the UK you apply through the Polish Embassy in London or the consulates in Belfast, Edinburgh or Manchester. Britain and Poland both allow dual citizenship, so a successful application does not cost you your British passport. Everything turns on documents: you have to show that your ancestor was Polish and did not lose that status before it passed down to you.

Can I get Polish citizenship through my grandparents?

Often, yes. The law sets no generation limit, but there is no automatic answer either. Polish citizenship is inherited by blood (ius sanguinis). Each person in the chain, from the ancestor who left Poland down to you, has to have been a Polish citizen at the moment the next generation was born. If one link is broken, confirmation fails for everyone below it.

It comes down to four questions:

Was your ancestor a Polish citizen in the first place, under the law in force at the time (for most families, the 1920 citizenship law)?
Did he or she lose that citizenship before your parent was born, for example by naturalising in Britain too early?
Did citizenship actually pass to your parent under the rules of the day, which were different for fathers and mothers, and for children born inside and outside marriage?
Did your parent keep it until you were born?

A grandfather who served in the Polish Armed Forces, settled here after the war and naturalised on or after 19 January 1951 can give a strong case, although time in the Polish Resettlement Corps needs checking (see below). Families who emigrated before the First World War are much harder, because Poland only re-emerged as a state in 1918 and its first citizenship law dates from 1920.

The key historical rules in plain English

Polish authorities apply the law in force when each event happened.

The 1920 law (until 18 January 1951)

The law of 20 January 1920 on citizenship of the Polish State set the ground rules for the interwar generation. Under it:

Children born in marriage took their father’s citizenship; children born outside marriage took their mother’s.
A foreign woman who married a Polish citizen became Polish.
A Polish woman who acquired her foreign husband’s citizenship on marriage lost Polish citizenship.
Citizenship was lost by acquiring a foreign citizenship, or by accepting public office or entering military service in a foreign state without the consent of the Polish Government.
Unless the Minister of the Interior decided otherwise, a man’s loss of citizenship extended to his wife and to his children under 18.
Men still liable for active military service could acquire a foreign citizenship only with permission from the Minister of Military Affairs. Without it, Poland continued to treat them as Polish citizens.

As a rule, then, a Pole who became a naturalised British subject before 19 January 1951 lost Polish citizenship, and usually so did his wife and children under 18. The military-service exception can change that answer for men of service age, so the date of naturalisation and the man’s age at the time are among the first things to check in a British family’s file.

The 1951 law (from 19 January 1951)

The law of 8 January 1951 came into force on 19 January 1951. It kept as Polish citizens those who held citizenship under the earlier rules, with exceptions. One matters for families from the former eastern provinces: people living permanently abroad who had been Polish citizens on 31 August 1939 but were of Russian, Belarusian, Ukrainian, Lithuanian, Latvian or Estonian nationality (and, with one exception, German nationality) were not treated as Polish citizens.

The law also changed the key point for emigrants: a Polish citizen could acquire a foreign citizenship only with the permission of the Polish authorities. Taking British nationality without that permission no longer ended Polish citizenship. This is why many Poles who naturalised in Britain after January 1951 remained Polish in the eyes of Polish law.

Two other changes affect the next generation. Marriage no longer changed either spouse’s citizenship. And a child acquired Polish citizenship at birth if both parents were Polish; a child born abroad to one Polish and one foreign parent acquired it only in narrower circumstances (Article 9 of the law). Births in mixed marriages between 19 January 1951 and 1962 therefore need careful checking. Finally, the law allowed the state to deprive individual citizens living abroad of their citizenship, for example for breaching the duty of loyalty, with decisions published in the official gazette Monitor Polski.

The 1962 and 2009 laws

The law of 15 February 1962 replaced the 1951 one. Under it, a child with one Polish and one foreign parent acquired Polish citizenship at birth, unless the parents chose the other parent’s citizenship for the child in a declaration made within three months of the birth. The current Act on Polish Citizenship of 2 April 2009 applies today. Under the 2009 Act, a Polish citizen who also holds another citizenship has the same rights and duties towards Poland as anyone else, and cannot rely on the other citizenship in dealings with the Polish authorities. The UK government’s own guidance states plainly that dual citizenship is allowed in the UK.

Why post-war Polish soldiers in Britain are a special case

Service in the Polish Armed Forces in the West, though under British operational command, was service in the Polish army, so it did not in itself end Polish citizenship. The difficulty lies after demobilisation.

In 1946 many soldiers joined the Polish Resettlement Corps, a British-run formation created to ease their transition into civilian life. On 26 September 1946 the communist Provisional Government of National Unity issued resolutions depriving General Władysław Anders and 75 other officers of Polish citizenship, citing the 1920 law and their joining that Corps. The resolutions were later revoked. Whether an ordinary soldier’s time in the Resettlement Corps, or any later service in the British forces, ended his citizenship is assessed case by case, so take legal advice if your ancestor served in either.

For the same reason, the soldier’s service record matters twice: it is strong evidence of Polish citizenship, and it shows the dates of discharge and of any enrolment in the Resettlement Corps or transfer to British service. See our guide to MOD Polish service records for how to request the file.

How to apply from the UK, step by step

Check the line of descent. Draw up the chain from the Polish ancestor to you with dates of birth, marriage and naturalisation for each person. Mark any naturalisation before 19 January 1951 and any service in a foreign army.
Gather the evidence. Collect Polish records for the ancestor and British certificates for every later generation (see the list below).
Arrange translations and apostilles. The consulate states that every document in a foreign language must be translated into Polish, by a sworn translator or by a consul. British documents count as non-EU documents, and the consulate’s guidance is that these need an apostille.
Complete the application form. It is completed in Polish and asks for your data and that of your parents and grandparents.
Submit through a consulate. Book an appointment by email with the citizenship section in London, Belfast, Edinburgh or Manchester, or send the papers by post. Emailed applications are not accepted. The consul forwards the file to the voivode.
Wait for the decision. The voivode issues an administrative decision confirming (or refusing to confirm) your citizenship. You can appeal to the Minister of the Interior and Administration within 14 days.

The competent voivode is the one for your last place of residence in Poland; if you never lived there, it is the Mazowieckie Voivode in Warsaw, which is why most British applications end up there. You can also apply directly to the voivode in Poland, in person or through a representative with a power of attorney. Each child needs a separate application: minors cannot be added to a parent’s.

Fees and timescales

Step	Fee	Source
Confirmation of citizenship through a UK consulate	£88	Poland in the UK, consular fees
Confirmation applied for directly to a voivode in Poland	277 PLN	Ministry of the Interior (MSWiA)
Transcription of a British certificate through a UK consulate	£53	Poland in the UK, consular fees

These fees applied at the time of writing (September 2026); check the current table before you pay. The law gives the voivode six months to decide, extendable and excluding time spent obtaining records from other offices; the consulate says there is no fixed timeframe.

What documents you usually need

The consulate asks for proof of Polish citizenship, any name-change documents, a valid ID, proof of marital status and, if you were born outside Poland, your full birth certificate. In a descent case, most of the work is proving citizenship:

For the Polish ancestor

A Polish birth or baptism record and, where relevant, a marriage record from the civil or parish register.
A pre-war Polish passport, identity card (dowód osobisty) or the application file for one; see our guide to pre-war Polish passport and ID applications.
Military documents: a Polish army service book, discharge papers or the MOD service record.
Population registers or residence records from the ancestor’s town, if they survive.

For the British side of the family

The ancestor’s British naturalisation papers, which fix the date he or she became British; see naturalisation records of Poles in the UK.
Full (long-form) British birth certificates for every generation down to you, and marriage certificates where they link the names.
Deed polls or other proof of anglicised or changed surnames.
Sworn Polish translations of all of the above.

Keep the name trail tidy. A grandfather registered as Wojciech Szczepański in Poland may appear as Albert Shepansky in Britain. Each change needs a bridging document. Our guide to building a citizenship evidence file explains how to organise this.

Transcription and PESEL: the steps after confirmation

A confirmation decision proves you are Polish, but it does not give you a passport on its own. Because you were born outside Poland, you normally first need a Polish birth certificate. This is done by transkrypcja (transcription): a Polish register office copies your British birth certificate into the Polish civil register. It can be arranged through a UK consulate, with the original British certificate and a sworn translation.

The Polish consulate explains that a Polish birth certificate is a necessary condition for assigning a PESEL number, the Polish national identification number. With a transcribed birth certificate and a PESEL you can then apply for a Polish passport at a consulate. The order is therefore: confirmation, transcription, PESEL, passport.

Restoration of citizenship: a different route

Restoration (przywrócenie obywatelstwa polskiego) is not a route for descendants. It is for a person who personally held Polish citizenship and lost it before 1 January 1999 under the 1920, 1951 or 1962 laws, for example a grandmother who lost it by acquiring British nationality on marriage before 19 January 1951. The application goes to the Minister of the Interior and Administration, through a consul if the person lives abroad, and it cannot include children.

Restoration takes effect from the date of the decision, so it does not reach back and make children born in the meantime Polish. That is why confirmation and restoration are different tools. Our guide to restoration for former Polish citizens covers who qualifies.

A worked example (illustrative)

Consider a fictional family. Józef was born in 1920 near Kraków to married Polish parents, served in the 2nd Polish Corps, came to Britain in 1946 and married an English woman in 1949. He was naturalised in Britain in 1957. His son was born in 1952 and his granddaughter in 1980.

Józef was a Polish citizen by birth under the 1920 law (his father was Polish).
By marrying him in 1949, his English wife also became a Polish citizen under the 1920 law, whatever her British status.
His service in the Polish army did not end his citizenship. If he joined the Polish Resettlement Corps, that period needs to be assessed separately.
He naturalised after 19 January 1951 without Polish permission, so under the 1951 law his naturalisation did not end his Polish citizenship.
His son, born in 1952, had two parents who were Polish in the eyes of Polish law, so he was Polish at birth.
The granddaughter, born in 1980 under the 1962 law, inherited it from her father, provided her parents did not choose a different citizenship for her within three months of her birth.

The evidence would be Józef’s Polish birth record, his army documents, his naturalisation certificate, and full British birth and marriage certificates for the next two generations. Had Józef naturalised in 1949 instead, the line would probably have been broken, subject to the military-service exception in the 1920 law.

When you need a Polish lawyer

This guide is general information, not legal advice. Take advice from a Polish citizenship lawyer if:

the ancestor left Poland before 1920 or lived in territory that changed hands;
there was a naturalisation, marriage to a foreigner or foreign military service before 19 January 1951;
the family came from the former eastern provinces and was not of Polish nationality;
a parent was born between 1951 and 1962 to one Polish and one non-Polish parent;
the ancestor served in the Polish Resettlement Corps or later in the British forces;
a birth took place outside marriage, or an adoption is involved;
a previous application has been refused.