- Poland’s Ministry of Finance published KSeF 2.0 API documentation and FA 3 e-invoice schema on June 30, 2025
- Mandatory structured e-invoicing for all businesses starts in 2026
- KSeF is Poland’s national e-invoicing platform for tax reporting and compliance
- KSeF 2.0 introduces FA 3 schema and modernized API
- API 2.0 documentation includes OpenAPI 3.0.4 specification, interactive online documentation, integration guides, SDK libraries, change logs, and sample invoice files
- Key features include full automation, broader integration, enhanced data accuracy, support for attachments, and comprehensive support materials
- New updates cover offline modes, QR codes, and KSeF certificates
- Offline modes guide invoice processing during connectivity issues
- QR codes include two types for online and offline invoices
- KSeF certificates will be used for API authentication from January 1, 2027
Source: taxilla.com
Note that this post was (partially) written with the help of AI. It is always useful to review the original source material, and where needed to obtain (local) advice from a specialist.
