A person of Polish origin is a person declaring Polish nationality, who demonstrates his/her relationship with Polishness and at least one of his parents or grandparents or two great-grandparents were of Polish nationality or confirmed his belonging to the Polish Nation by cultivating Polish traditions and customs. Evidence confirming Polish origin are documents issued by Polish state or church authorities, as well as by the authorities of the former USSR regarding a foreigner or his parents, grandparents or great-grandparents, e.g. documents confirming the completion of military service in the Polish Army, containing an entry informing about Polish nationality, or documents confirming the fact of deportation or imprisonment, containing an entry informing about Polish nationality.
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