Support KSeF

The National e‑Invoice System (KSeF) is a government platform for issuing, receiving, and archiving electronic invoices in a single, standardized format.

The obligation to use KSeF will be introduced gradually:

• from 1 February 2026 – for companies with turnover above PLN 200 million,
• from 1 April 2026 – for all other businesses.

The instruction is available on the Ministry of Finance website: https://www.gov.pl/web/kas/jak-uzyskac-dostep-do-ksef

The objectives of KSeF are to:

• organize and simplify the flow of invoices,
• reduce errors and abuses,
• enable faster verification of documents,
• make archiving and controlling documents easier.

The entire process will be adjusted automatically.

After Axpo issues an invoice, you as the buyer will receive it in XML format in your KSeF account and additionally as a PDF file (a visual version of the invoice), just as before.

If you would like to stop receiving invoices as email attachments (PDF) and use only KSeF, please contact us – we will update your preferences accordingly.

You will receive invoices in XML format in your KSeF account, and as before, their visual version (PDF) will be sent as an email attachment.

Two new elements will appear on the invoice:

• the KSeF number identifying the document,
• a QR code to facilitate verification.

No.

The introduction of KSeF does not affect the contractual terms. Bank account numbers, payment deadlines, and other settlement rules remain unchanged.

Yes.

You will continue to receive a PDF file reflecting the data from the invoice registered in KSeF.

During technical downtime, emergency modes apply.

We ensure continuity in issuing and delivering invoices – once the system is restored, the invoices will be registered in KSeF.

The KSeF number will be visible on the delivered invoice image (PDF) and in your KSeF account.

Starting from the date on which KSeF becomes mandatory for your company, invoices for Axpo must be issued and sent exclusively via KSeF.

If you join KSeF on:

• 1 February 2026 – from that day onward, please issue invoices in KSeF. Sending them through any other channel is not necessary.
• 1 April 2026 – until 31 March 2026, invoices may still be sent in the current form, by email, to the agreed addresses. However, from 1 April 2026, please issue them exclusively through the National e‑Invoice System (KSeF).

An invoice with two QR codes was issued in offline mode. This means that the document was generated during a period of unavailability, outage, or technical issues on the KSeF side. In such cases, the invoice contains two QR codes, each serving a different purpose:

• the “OFFLINE” QR code – provides access to the invoice in KSeF and allows you to verify the data recorded on the document,
• the “CERTIFICATE” QR code – is used to confirm the identity of the issuer when the invoice is created in offline mode.

You can find detailed information here:

• https://www.podatki.gov.pl/ksef
• https://ksef.pl