In the United Kingdom, Discover credit cards issued on the MasterCard network under the Goldfish brand and Morgan Stanley. This division was purchased from Lloyds TSB in 2005. It was subsequently sold to Barclays on February 7, 2008. These maps have been rebranded as Goldfish Barclaycard Platinum and Barclaycard respectively. While the Discover brand cards are not currently accepted in Europe, the company's presence continues to grow in Mexico, Costa Rica, Micronesia, Marshall Islands, Belize, Palau, and many nations Caribbean Islands. The website of the FAQ section describes http://www.discovercard.com/customer-service/faq/international.html where Discover Card is accepted outside the United States.

In addition, in May 2005 Discover Network announced an alliance with China UnionPay Network. The two companies signed a long-term agreement that will lead to acceptance of Discover Card brand to Network UnionPay ATMs and point of sale terminals in China and acceptance of China UnionPay cards on the PULSE network States United CUP cards are accepted in the United States since December 2005, and discover cards have been accepted in China since November 8, 2006. The partnership makes Discover Card the most widely accepted U.S. card in China, beating competitors from Visa, MasterCard and American Express. Discover Financial Services, neither China nor UnionPay have indicated whether there were plans to eventually increase the acceptance of other countries where the CUP network is in place, ie, the Philippines, Singapore, Thailand , Vietnam and South Korea. A similar agreement was made in August 2006 when the Discover Network announced an alliance with Japan's JCB Network. JCB Cards will be accepted on the Discover network in the United States, Puerto Rico, Guam and Northern Mariana Islands from 12 October 2007 and China UnionPay cards will be accepted on the Discover network in the United States, Canada, Mexico, America Central and the Caribbean from November 1, 2007.

On 24 August 2006, the Discover Network and the pulse of the UK LINK ATM network announced a reciprocal agreement that allows more than 4,500 financial institution participants in the PULSE network to offer their cardholders access to all but a handful of over 58,000 ATMs throughout the United Kingdom and allow LINK to offer its 38 members of the participating financial institutions access to over 265,000 ATMs aux Etats-PULSE USA.

Explore the acquisition of Diners Club

In April 2008, Discover Financial Services and Citigroup announced the purchase of discovery was the Diners Club network Citi for $ 165 million. In May 2008, the United States has approved the transaction. The operation was concluded on 1 July 2008. Discover said Diners Club network, which is an extensive network outside of North America, will be merged with the discovery of the network, an extensive network in North America, the creation of an international network for the discovery of network cards and Diners Club. Diners Club cards will be issued by licensees Diners Club International, including Citibank. Discover Bank has no plans on issuing the Diners Club brand itself. Discover just bought the network, not licensees of issuing cards.