Introduction to E-INVOICE

What is e-invoicing?

E-invoicing is the creation, transmission, and receipt of invoice data in a structured electronic format (XML, not PDF) that allows automated validation and processing by software systems. It replaces manual PDF- or paper-based invoicing with electronic invoicing.

fiskaly’s E-INVOICE product handles format generation, validation, transmission to national platforms, and long-term archival — so you do not need to implement country-specific formats and submission protocols yourself.

💡E-INVOICE is separate from our SIGN services

E-INVOICE covers B2B/B2G/B2G e-invoicing. SIGN covers B2C transaction signing at the POS. They are independent products. You may need one, the other, or both depending on your business.

How it works

The integration follows the same pattern across all countries:

1. Authenticate — POST /auth with your API credentials (same as SIGN)
2. Create an e-invoice — Submit the e-invoice data with country-specific payload fields
3. fiskaly validates — Schema and business rule validation before submission
4. fiskaly transmits — Delivery to the national platform (Peppol, SDI, PPF, KSeF)
5. Track status — Retrieve delivery and acceptance status

European regulatory context

E-invoicing requirements across Europe are driven by the EN 16931 standard — a common semantic data model for invoices. Each country adds its own:

• Format — XRechnung, Factur-X, FatturaPA, etc.
• Transmission network — Peppol, SDI, PPF, KSeF
• Mandate timeline — when B2B e-invoicing becomes mandatory
• Archival rules — how long invoices must be stored

fiskaly abstracts these differences behind a single API. Your integration work on the first country carries forward to every subsequent market.

💡Start integrating now

The Integration Guide covers the shared API surface. Country-specific requirements are added on top of the base schema — early integration work is not wasted.

Next steps

Country Coverage

When each country module becomes available

General Step-by-Step Integration

Shared integration process for all Unified API solutions

Country-specific Integration

Country-specific requirements and taxpayer data