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Mikrorachunek Checker
Check whether a mikrorachunek podatkowy number matches the official format and extract the embedded PESEL or NIP.
PESEL Generator
Generate valid random PESEL numbers with correct checksums. Pick birth date and gender, get a properly encoded Polish ID number instantly.
REGON Number Generator
Generate valid 9-digit and 14-digit Polish REGON numbers with correct check digits for testing.
Top articles
How to Get a PESEL for Your Child Born Abroad or Newborn in Poland
How to get a PESEL for your child born outside Poland or as a newborn. Required documents, which office to visit, and what to expect.
7 min readWhen Do You Have to Give Your PESEL in Poland? Your Rights Under RODO
Learn when you're legally required to share your PESEL number in Poland and when you can refuse under RODO (GDPR). A foreigner's guide to data protection.
8 min readHow to Get Polish Citizenship by Descent
How to get Polish citizenship by descent. Eligibility rules, required documents, application steps, costs, and timelines for ancestry-based claims.
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