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Poland

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KSeF

Poland's mandatory national clearance system run by the Ministry of Finance. Invopop converts invoices to FA(3) XML, submits them to KSeF in real time, and returns the unique KSeF ID and verification QR code before the invoice reaches the buyer.

Implementation docs

Real-time clearance

Submit to KSeF and receive a unique KSeF ID before the invoice is delivered.

FA(3) XML

GOBL is converted into Poland's mandatory FA(3) schema, ready for KSeF validation.

QR code

Every invoice carries the FA(3) QR code so recipients, including international buyers, can verify it against KSeF.

Invoice reception

Poll KSeF on a schedule and import received invoices into your accounts payable workflow as GOBL.

Certificate management

Upload and manage KSeF authentication certificates securely via the API.

FA(3)

The structured XML schema that KSeF validates against, published by the Polish Ministry of Finance. Invopop maps GOBL to FA(3) using the pl-favat-v3 addon, validates it in real time, and returns the KSeF ID, official timestamp, and verification QR code.

Implementation docs

FA(3) XML

Invopop encodes invoices in FA(3), the schema KSeF 2.0 validates against, using the GOBL pl-favat-v3 addon.

Real-time validation

Each document is validated against the FA(3) schema and KSeF business rules at submission.

QR code

Invopop generates the FA(3) QR code linked to the KSeF verification portal.

Unit-of-measure handling

Both canonical UN/ECE codes and Polish free-form labels are supported.

PDF

The universal visual invoice that works for any recipient. Invopop renders a branded, multilingual PDF from the same GOBL source, with every field the destination country requires, locale-correct formatting, and built-in email or webhook delivery.

Implementation docs

Every field, every format

PDFs include every field the destination country requires, automatically.

Localized in 10+ languages

Issue invoices in English, Spanish, German, Italian, Portuguese, Arabic, Greek, Polish, and more, with locale-correct date and number formatting.

Built-in email delivery

Invoices are emailed directly to clients from Invopop's domain or your own.

Invoices, credit notes and more

Produce standard invoices, proforma invoices, credit notes, corrective documents, and receipts.

Customisable templates

Templates support logo configuration, standard page layouts, and per-locale formatting.

Built on GOBL

Rendered from GOBL, the open-source invoicing standard, for full transparency and no vendor lock-in.