VIESAC

VIESAC is a WordPress plugin designed to provide automated EU VAT number validation and B2B tax handling for WooCommerce stores. It addresses the need for real-time VAT compliance in e-commerce transactions involving business customers across the European Union. The plugin validates VAT numbers at checkout against the official EU VIES (VAT Information Exchange System) database, ensuring that only valid VAT numbers are accepted for B2B orders.

With VIESAC, WooCommerce store owners can automate the application of zero-rated VAT for eligible B2B transactions when a valid EU VAT number is provided. The tool generates a complete audit trail for each validation, logging order references, invoice numbers, and company details. For compliance and auditing purposes, it offers downloadable PDF certificates of each VAT validation directly from the order administration area, supporting ViDA-ready documentation and making it easier for accountants and auditors to access proof of compliance.

The plugin supports both the Classic (shortcode) and Block checkout workflows in WooCommerce, ensuring compatibility with different store setups. It features a VAT field at checkout, performs validation on blur, and applies B2B tax exemption automatically. The phone field is optional for B2B orders. All validation data is encrypted and stored on EU servers located in Germany, meeting full GDPR requirements and ensuring that sensitive information is protected.

VIESAC is available as a free WordPress plugin that can be installed via the WooCommerce plugin interface or uploaded manually. It requires an API key from VIESAC to operate. The service offers a free tier with 15 VAT audits per month and does not require a credit card to get started. This solution is particularly relevant for WooCommerce store owners, accountants, and auditors who need reliable, audit-ready VAT validation and documentation for EU B2B sales.