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1. What is the National System of e-Invoices (KSeF)?
2. Do invoices issued in the National System of e-Invoices by Allegro look the same as before?
3. What is the invoice issue date?
4. Is the payment due date different now?
5. Are correcting notes still in use?
6. Do you also issue debit notes through the National System of e-Invoices?
7. What is an invoice visualization from the National System of e-Invoices?
8. What kind of invoice will I get if I run a non-registered activity?
9. Will I get an invoice duplicate?
10. Will I get a correcting invoice in certain cases and, if so, which ones?
11. Can I receive an invoice on demand?
12. For how long will an invoice be stored on Allegro and in the National System of e-Invoices?
13. Will I get an invoice if the National System of e-Invoices is unavailable?
Invoices from Allegro in the National System of e-Invoices (KSeF) — Frequently Asked Questions
In this article, you can find answers to frequently asked questions about invoices we issue through the National System of e-Invoices.
From February 1, 2026, you can find all invoices from us in the National System of e-Invoices (KSeF). You can also access visualizations of invoices in PDFs in the Invoices tab.
- What is the National System of e-Invoices (KSeF)?
- Do invoices issued in the National System of e-Invoices by Allegro look the same as before?
- What is the invoice issue date?
- Is the payment due date different now?
- Are correcting notes still in use?
- Do you also issue debit notes through the National System of e-Invoices?
- What is an invoice visualization from the National System of e-Invoices?
- What kind of invoice will I get if I run a non-registered activity?
- Will I get an invoice duplicate?
- Will I get a correcting invoice in certain cases and, if so, which ones?
- Can I receive an invoice on demand?
- For how long will an invoice be stored on Allegro and in the National System of e-Invoices?
- Will I get an invoice if the National System of e-Invoices is unavailable?
1. What is the National System of e-Invoices (KSeF)?
It is a solution by the Polish Ministry of Finance that allows entrepreneurs to issue, receive, and store structured invoices. For all Polish VAT payers, using the National System of e-Invoices:
- is obligatory from February 1 in case of big enterprises — those that achieved sales over 200 million PLN (with VAT) in 2024
- will be obligatory from April 1 in case of the remaining enterpreneurs.
2. Do invoices issued in the National System of e-Invoices by Allegro look the same as before?
No, our invoices look differently now. They have some new elements:
- logo of the National System of e-Invoices — instead of the logo of Allegro
- QR code and link to the invoice in the National System of e-Invoices — just scan the QR code or click the invoice link to quickly access it directly in the system
- invoice issue date — before, it was the last day of the month. From February, the invoice issue date is from the beginning of the next month.
3. What is the invoice issue date?
From February 1, 2026, the invoice issue date is from the beginning of the month following the month when the service is carried out. Before, the invoice issue date was always the last day of the month.
For example, the issue date on an invoice for services carried out in January is:
- before: January 31
- now: one of the first days of February.
4. Is the payment due date different now?
No. The payment due date remains the same. It is still the 14th day of the month following the month when the service is carried out. The invoices in which the Total amount to be paid field shows 0 PLN will be an exception. We will not indicate the payment method and due date on such documents.
5. Are correcting notes still in use?
No. From February 1, 2026, correcting notes are no longer used. If you notice a mistake on the invoice (for example, in your company name or address), report it to us. We will amend the data with a correcting invoice — this document type will now be used instead of correcting notes. We will also send this document to the National System of e-Invoices.
6. Do you also issue debit notes through the National System of e-Invoices?
No. We will issue so-called debit notes — documents related to debits that remain outside the VAT scope — as before. We will not send them to the National System of e-Invoices.
7. What is an invoice visualization from the National System of e-Invoices?
It is a graphic representation of the invoice in a PDF file. It allows to display the invoice in a clear and an understandable way. It is mandatory for us to share invoice visualizations with:
- foreign companies that do not have the Polish Tax Identification Number (NIP) and are not obliged to use the Polish National System of e-Invoices
- buyers who are natural persons.
For consistency, we decided to share visualizations with all sellers — which is why Polish entrepreneurs, for whom the National System of e-Invoices is obligatory, also have access to them.
You can find invoice visualizations in the Invoices tab.
8. What kind of invoice will I get if I run a non-registered activity?
In such a case, we will issue the invoice in the National System of e-Invoices. In the Invoices tab, you can find a visualization of this invoice along with the QR code and invoice number from the National System of e-Invoices.
9. Will I get an invoice duplicate?
No. In case of invoices issued in the National System of e-Invoices, there is no need to issue duplicates — similarly to e-invoices. Invoices are stored in the National System of e-Invoices for 10 years — you can access them during this period. You can download an invoice in the original XML format or its visualization again anytime.
10. Will I get a correcting invoice in certain cases and, if so, which ones?
As before, we will issue a correcting invoice when it is necessary to update settlements from the original invoice. Additionally, from February 1, 2026, we use correcting invoices to amend incorrect details such as the address or the company name.
11. Can I receive an invoice on demand?
Yes, but only in specific cases. We will still issue invoices on demand only from a date within the last 3 months.
12. For how long will an invoice be stored on Allegro and in the National System of e-Invoices?
In the National System of e-Invoices, an invoice will be stored for 10 years. On Allegro in the Invoices tab — for 7 years.
13. Will I get an invoice if the National System of e-Invoices is unavailable?
The system might be unavailable for different reasons and periods. The legislator took such situations into account and prepared specific procedures for different incidents.
If the National System of e-Invoices stops working, we will issue an invoice in the so-called emergency mode (website available in Polish):
- We will issue the document in the emergency mode and share it with you in the Invoices tab.
- Such an invoice will get a special QR code and a unique certificate.
- Once the system is restored, we will transfer the invoice to the National System of e-Invoices within 7 business days so that the system assigns it a number.
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