As required by Polish regulations (starting on February 1st 2026), taxpayers issuing invoices in Poland must use KSeF (National e-Invoicing System). Please be advised that KSeF functionality is available exclusively in the PL region in Fakturownia. KSeF is not supported in other language or regional versions. If have an account in InvoiceOcean and your business is subject to Polish invoicing regulations and requires KSeF, you must request a switch of your account to the PL region (Fakturownia) in order to get the KSeF feature and remain complaint. To request the change or obtain support, please contact our support team at InvoiceOcean as soon as possible.