The Netherlands Mandatory August 17 Deadline Set for Updated SI-UBL and Peppol Validation Rules

The Dutch Peppol Authority has published updated validation artefacts for SI-UBL 2 (NLCIUS) and Peppol BIS 3. The new rules become mandatory from 17 August 2026, while the current versions remain valid until then. The update also aligns with EN 16931 version 1.3.16, the European e-invoicing standard.

The change affects structured electronic invoices and credit notes exchanged through SI-UBL or Peppol channels. For retailers, this is mainly relevant in B2B and B2G invoicing, supplier invoice processing, ERP integrations, e-commerce platforms, and POS systems that generate structured business invoices.