The crucial issue in each administrative procedure for the confirmation of Polish citizenship is relevant Polish documents, meaning issued by Polish authorities in Poland after 1920, through which it is possible to prove that your ancestors were Polish citizens. According to 2011 Polish legislation, an application not supported by Polish documents will not be even approved for processing. Therefore, in the event that a person applying for the confirmation of Polish citizenship does not have Polish documents, it is necessary to search for them in archives in Poland and Germany, Belarus, Ukraine, and Lithuania.
The most important documents are as follows:
It is necessary to prove that there was no loss of Polish citizenship as a result of emigration and naturalization in another country. Relevant documents produced by the country in which your ancestor lived and finally settled are:
Usually the most easily obtainable documents are those proving the family line from your ancestors that emigrated from Poland to you. These are:
The most important aspect of the application process is Polish documents that prove your ancestors acquired and held Polish citizenship. As of 2011, without these documents it is not possible to apply for citizenship according to new legislation that mandates any application that is not based on Polish documents will not be accepted for processing.
Documents proving that citizenship was not lost are, of course, also crucial.