BACs Payment
VocaLink are specialists in providing automated payment systems to banks, corporate customers and government departments, including BACs payments solutions and the Immediate Payment Platform for faster payments.
http://www.vocalink.com/

Citibank
One of the largest full service banks in the world offering an unparalleled range of products and services including banking, credit cards, lines, loans, investing and more.
http://www.citibank.com/

Credit Card Processing Companies
Comparison shopping website for credit card processing providers.
http://feefighters.com

HSBC
Official website. Open an online savings account or CD. Apply for a credit card, mortgage loan, or term-life insurance. Includes investor relations and press releases, and branch and ATM locator.
http://www.hsbcusa.com/