France will enforce e-invoicing for B2B transactions from 1 September 2026, requiring all VAT‑registered businesses to receive and issue invoices in UBL, CII, or Factur‑X formats via certified dematerialisation platforms. The obligation extends to SMEs and micro‑businesses on 1 September 2027, and the Business Directory based on SIREN numbers will replace email addresses for recipient identification.

Mexico’s tax authority, SAT, has introduced Rule 2.9.21, requiring digital service providers and marketplace platforms to grant direct, real‑time access to transaction data. The rule, effective April 1 2026, imposes a final deadline of April 30 2026 for submitting a Notice of Access. The mandate targets a wide range of digital businesses, including foreign operators, and presents significant technical challenges due to the lack of published API specifications.

Vietnam's Ministry of Finance has issued a draft decree to streamline e-invoicing for e-commerce and low-value transactions, shifting invoice issuance to platform operators and allowing small businesses below thresholds to issue consolidated daily invoices. The Finance Ministry also proposed extending e-invoicing to businesses with sales above VND 1 billion on 10 December 2025, and Circular 32/2025 provides detailed guidelines on numbering, use cases, and service provider standards. A June 2024 directive urges the remaining non‑compliant businesses, especially retail outlets, to adopt e‑invoicing, following the successful Phase 2 rollout in 2022 that registered 92 % of obligated taxpayers.

Spain has introduced mandatory B2B e‑invoicing under Royal Decree 238/2026, effective from 31 March 2026 but operationally deferred until the public e‑invoicing platform regulation takes effect. The decree sets phased implementation: large businesses with turnover over €8 million must comply within 12 months, while all other businesses follow within 24 months. It also imposes strict invoice status reporting within four calendar days and allows four electronic formats.

Slovakia will enforce mandatory B2B e-invoicing via the Peppol network from 1 January 2027 under Law 385/2025 Z.z., following a voluntary testing period in 2026. All e-invoices must use the EN 16931 XML standard (UBL 2.1 or CII), be issued within 15 days, and reported within 5 days, with penalties up to €10,000 per infraction and €100,000 for repeated violations.

Germany’s Federal Ministry of Finance updated its e-invoicing FAQs in March 2026, tightening the definition of a compliant E‑Rechnung. The guidance requires that 100 % of mandatory VAT data be embedded in structured XML, mandates embedding of supporting documents, and confirms that monthly summary invoices remain valid if the supply period is clearly defined. These clarifications signal enforcement intent ahead of the 2027 B2B e‑invoicing mandate and the 2030 EU Digital Reporting Requirements.

Romania’s new e-VAT pre-filled return system requires taxpayers to approve a monthly list of VAT transactions derived from e-invoicing and SAF‑T and reconcile it with their regular VAT return. The penalty‑free soft launch ran from August 2024 to 1 January 2025, giving 20 days to explain discrepancies, and new measures under GEO No. 13/2026 will suspend ANAF’s risk‑classification communication until 31 December 2026.