The Foreign Account Tax Compliance Act (FATCA) is a law issued by the US, promulgated on 18 March 2010 and which came into force on 1 July 2014. In essence, FATCA is a reporting requirement for financial institutions, based on accounts held by US taxpayers.
Romania is one of the countries that are treated by the US as having an intergovernmental agreement into force. Romania has reached an agreement in substance and has agreed to be included on the list of countries published by the IRS on their website (see here ).
Idea Bank S.A. has registered on the IRS website with the status FATCA Registered Deemed-Compliant Financial Institution (including a Reporting Financial Institution under a Model 1 IGA) and has received the Global Intermediary Identification Number (GIIN) 2M4Y89.99999.SL.642. The Withholding Certificate W-8BEN-E filled in by Idea Bank is available here.