EU & UK VAT Validation Built for Shopify B2B Stores.

Selling B2B across European borders requires robust proof that your customer held an active VAT registration at the exact moment of sale. Under EU VAT legislation and national tax law across member states, applying zero-rated cross-border tax without official verification makes the seller liable for the unpaid VAT plus penalties during a tax audit.

Standard Shopify tax settings treat international sales uniformly or require tedious manual customer tax exemption approvals. VIESAC automates this entire lifecycle: the buyer provides their VAT number at checkout, the number is verified in real-time against national tax databases, zero-rated tax is applied dynamically, and an official consultation number is securely archived.

Unlike basic syntax regex checkers, VIESAC executes real-time upstream queries against the European Commission VIES platform, the UK HMRC API, the Swiss Federal Statistical Office UID register, and Norwegian Brønnøysundregistrene. Each validation returns a cryptographic record and downloadable certificate that protects your business under tax audit standards.

With the upcoming ViDA (VAT in the Digital Age) regulations mandating electronic reporting and near-instant digital audit verification, having automated, structured VAT verification on Shopify is no longer optional—it is a vital operational safeguard for every cross-border e-commerce brand.