Starting April 1, 2026, due to the introduction of the National e-Invoice System (KSeF) in Poland, self-billing documents for Polish publishers issued on their behalf by Polish providers will be available exclusively through KSeF.

After a self-billing document is issued in KSeF, the publisher will receive a visualization of it in PDF format via email. The same file will also be available for download on our platform.

To grant self-billing authorizations to a Polish provider, log in to the KSeF portal at https://ap.ksef.mf.gov.pl/web/home and follow the steps below.

1. Go to the Uprawnienia (Authorizations)tab
2. Select Nadaj Uprawnienie (Grant Authorization)
3. In the Rodzaj uprawnienia (Type of authorization) field, select the option: Podmiotowi do wystawiania faktur w trybie samofakturowania (To an entity for issuing invoices in self-billing mode)
4. Enter the NIP (Tax Identification Number) of the Polish provider
5. Enter the Pełna nazwa (Full name) of the Polish provider
6. Click the Nadaj uprawnienia (Grant authorizations) button.