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② 後台搜尋「VIESAC – Free VAT Validation for WooCommerce」→ 直接安裝（推薦）
原文外掛簡介
VIESAC adds free VAT validation to WooCommerce checkout. It validates EU, Norwegian, Swiss, and Northern Ireland VAT numbers and stores VIESAC certificates for audit-ready B2B orders.
Features
Free unlimited VAT validation – Validate VAT numbers at WooCommerce checkout
15 VIESAC audits per month – Full audits with VIES certificate storage
Lifetime storage – VIES certificates stored permanently
EU VIES compliance – VAT number validation for EU businesses
B2B tax exemption – Automatic WooCommerce tax removal when VAT is valid
Certificate download – PDF certificate available in order details
Company and VAT fields – Adds company name and VAT number fields to checkout
Checkout blocks support – Works with WooCommerce Blocks
HPOS compatible – Compatible with WooCommerce Custom Order Tables
Supported countries
All EU member states plus Northern Ireland (XI), Norway (NO), and Switzerland (CH).
Getting started
Install and activate the plugin.
Go to WooCommerce -> VIESAC.
Get your free API key from https://viesac.eu/app/api.
Enter the API key and save.
Languages
VIESAC is available in 25+ languages: English, German, French, Spanish, Italian, Polish, Dutch, Romanian, Greek, Czech, Swedish, Hungarian, Portuguese, Bulgarian, Danish, Finnish, Slovak, Croatian, Latvian, Estonian, Lithuanian, Slovenian, Russian, Turkish, Arabic, Ukrainian.
External services
This plugin connects to the VIESAC API to validate VAT numbers, retrieve account usage information, and optionally create audit records with certificate storage.
It sends data to https://viesac.eu only when a store administrator enters an API key and the plugin performs one of these actions:
VAT validation and audit creation via https://viesac.eu/api/v1/audits
Account and usage lookup via https://viesac.eu/api/v1/account
Depending on the action, the plugin may send:
VAT country code and VAT number
Company name
Company address
Order number
Order audit details in XML format for certificate generation
Service provider documentation:
Privacy Policy: https://viesac.eu/privacy-policy
Terms of Service: https://viesac.eu/terms-of-service
