The plugin allow you to validate your clients VAT Number using the online VIES service from Agenzia delle Entrate. If you don’t currently have a VAT Number field you can easily add one from the settings menu. If you already have one just specify the field ID and the validation will take place on your existing field. For more information about VIES see https://telematici.agenziaentrate.gov.it/VerificaPIVA/Scegli.jsp Based on eu-vat-validator: a simple and clean PHP library that validates EU VAT registration numbers against the central ec.europa.eu database.
