On 21 September 2026, the German Federal Central Tax Office (BZSt) reported a partial outage affecting the online verification system for VAT identification numbers (USt-IdNr) via the ELSTER portal and the EU’s VIES (VAT Information Exchange System) interface. The disruption, which began in the early morning hours, prevented businesses from performing real-time validation of counterparties’ VAT IDs — a critical step for applying zero-rated intra-Community supplies under § 4 No. 1b UStG and for compliance with the EU’s VAT Directive (2006/112/EC). The BZSt attributed the issue to a technical malfunction in the data synchronization between the national VAT register and the EU VIES database. While the core ELSTER authentication and submission functions remained operational, the automated USt-IdNr confirmation service returned intermittent errors or timeout responses. The BZSt advised affected taxpayers to document the outage timing and, where urgent verification is required, to use the manual verification procedure via the BZSt’s dedicated hotline or to request written confirmation from the counterparty’s tax office. Normal service was restored by late afternoon on 22 September 2026. The incident underscores the operational dependency of cross-border VAT compliance on centralized digital infrastructure and the need for robust fallback procedures in supply chains.
Key Takeaways
- Critical Compliance Dependency: Real-time VAT ID verification is mandatory for zero-rating intra-EU B2B supplies. The outage exposed systemic risk where technical failures can jeopardize VAT treatment and trigger downstream audit exposures.
- Documented Fallback Procedures Essential: Businesses must maintain documented contingency processes — including manual verification via BZSt hotline (+49 228 406-1234) and written confirmations — to demonstrate due diligence during system outages and avoid penalties for incorrect zero-rating.
- Monitor BZSt Status Channels: The BZSt publishes service status updates on its website and via the ELSTER newsletter. Tax and IT teams should integrate these feeds into monitoring dashboards to trigger automated alerts and activate fallback workflows immediately upon disruption.
Disclaimer: This article is compiled and summarized by the AI based on publicly available information and is for general information purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. Please consult a qualified professional tax advisor or legal counsel for tax advice.
Source: Read Official Announcement