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Top tools
Which Bank Is This IBAN?
Paste any IBAN to identify the bank, branch, and BIC/SWIFT code.
REGON Number Checker
Check any 9-digit or 14-digit Polish REGON number with automatic format detection and checksum verification.
NIP Checker
Verify any Polish NIP (VAT/tax ID) number with an instant checksum check and tax office prefix decode.
Top articles
How to Pay Tax on Rental Income in Poland
Step-by-step guide to paying tax on rental income in Poland: ryczałt rates, registration, monthly payments via mikrorachunek, and PIT-28 filing.
10 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 readNIP Number in Poland: How to Find, Check, and Validate It
What is a NIP number in Poland? Learn how to find your own NIP, check a company's tax ID, and validate any Polish NIP online.
7 min readLet's build Poland.gg together
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