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KSeF – important information for Clients

Dear Sir/Madam,

from 1 February 2026 onwards, Polmarkus Sp. z o.o. will be required to use the National e-Invoicing System (KSeF).

We encourage you to familiarise yourself with the full content of the communication, where we explain in detail the rules for issuing and sharing invoices as well as the most important

changes resulting from the implementation of KSeF.

Yours sincerely

The Polmarkus Team

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