Pursuant to the Law on the ratification of the Agreement between the government of the Republic of Bulgaria and the government of the United States of America to improve the international tax compliance and to implement FATCA (SG issue 47 dated 26 June 2015), Republic of Bulgaria is subject to comply with Foreign Account Tax Compliant Act (FATCA). This justifies the financial institutions in the country to be considered to have complied FATCA and should register with the Internal Revenue Service of the United States (IRS) as a participating financial institutions and acquire Global Intermediary Identification Number (GIIN) code.

First Investment Bank is registered in the IRS as a leading financial institution (Lead FFI) of the so-called Expanded Affiliated Group. Registration status is "Registered foreign financial institution complying with legislation" (Registered deemed-compliant). The obtained by the Bank GIIN code is: SP7FU7.00000.LE.100.