International banking institution credited with being one of the largest banks in the world. Citibank operates as a financial subsidiary of Citigroup and was founded in 1812. Citibank provides a number of standard banking services and also operates the credit card division of Citigroup. The Citibank division of Citigroup was hit hard by the global financial crisis of 2008 and as a result the company required assistance under the Federal Troubled Asset Relief Program (TARP).