Poczta Polska SA invoices only in the KSeF system from February 1, 2026.
From February 1, 2026, invoices for the sale of Poczta Polska SA services and goods to customers with a Tax Identification Number (NIP) will be available exclusively through the National e-Invoice System (KSeF). From that date, all companies, regardless of turnover, will be required to receive invoices via the KSeF system. More information can be found here.