The HOGART WHITE LIST program for VAT payer verification The program automatically checks contractors to see if they are registered on the White List of VAT payers. The application automates the batch process of vendor checking not only in National Tax Administration, but also verification in VIES and KRS, CEIDG, etc. databases. The system informs about the current or historical statuses of taxpayers from our databases. Verification activities are made based on a user-defined schedule and all verification results are sent to the e-mail addresses defined within the application setup.