DuplicateVatId.php Duplicate vat id handler. Tags copyright YetiForce S.A. license YetiForce Public License 6.5 (licenses/LicenseEN.txt or yetiforce.com) author Mariusz Krzaczkowski m.krzaczkowski@yetiforce.com Interfaces, Classes, Traits and Enums Accounts_DuplicateVatId_Handler Accounts_DuplicateVatId_Handler class.