What's new in KSeF Faktury
Every change to the app and the site, newest first. We describe what changed for your store, not in the code.
- Site KSeF Faktury API documentation for developers (early access): quickstart, guides, a reference with samples in cURL, PHP, Node.js and Python, the OpenAPI spec and a Postman collection.
- Site KSeF guide: 15 practical Polish articles for stores (certificate, token, 2027 deadlines, penalties, the PLN 10,000 limit, NIP in the cart, corrections), checked against the Ministry of Finance FAQ and the VAT Act.
- Rules Update: draft bill UD477 moves penalties for invoices outside KSeF to 1 January 2028 (still a draft). The Ministry announced KSeF tokens will stay after 2026; the regulation is yet to be amended.
- Site Video: KSeF Faktury in 47 seconds, with Polish captions.
- New KSeF certificate upload: drag the .crt and .key files into the window or pick them with a button.
- Fix When the plan limit is reached, an order waits without an invoice number and gets one after an upgrade or in the new month, so numbering has no gaps.
- New Buyer data encryption: order copies, invoice XML and PDF files and backups are encrypted (AES-256). New Security page.
- New Your own correction invoice number pattern, separate from invoice numbering.
- New Store readiness checklist: company data, KSeF connection, currency, shipping to Poland, VAT and the NIP field checked automatically, each with step-by-step help.
- New Connect to KSeF with your own KSeF certificate (.crt, .key and password) or a KSeF token, stored encrypted.
- New Foreign currency invoices: VAT in PLN at the NBP average rate (table A), with the table number and rate date on the invoice.
- Fix An order that cannot become an invoice goes to Problems with the reason and no longer holds up the others.
- New Monthly export for your accountant: CSV with net, VAT and gross amounts, plus a ZIP with FA(3) XML and PDF files.
- New Corrections on refunds: the correction invoice is issued automatically, sent to KSeF and linked to the order.
- New Invoice PDF with the QR code for KSeF verification, available to the buyer on the order page.
- New NIP field in the store cart, styled like your theme, with a checksum check.
- New First version: an FA(3) invoice sent to KSeF once an order with a NIP is paid, with the KSeF number saved on the order.