ABN AMRO
Aconite Technology
AllPay
AmbironTrustWave
American Express
Ameriprise
Apollo Enterprise Solutions
Assurz
Atos Worldline
Authorize.net
Banco Bradesco
Banco de Credito
Banco de la Provincia
Banco do Brasil
Banco Galicia
Banco Itau
Banco Privade
Banco Marco
Banco Mercantil
Banco Nacional de Costa Rica
Banco Nacional (Banamex)
Banco Patagonia
Banco Rio
Banco Santander
Banco Santander Banespa
Bancolombia
Bank of America
Bank of Montreal
Barclays Bank
BBVA Banco Continental
BBVA Banco Frances
BBVA Colombia
Bell ID
Benjamin Alexander Assoc.
Billeo Corp.
Boston Consulting
Cache
Caixa Enonomica Federal
Capital One
CardinalCommerce
Chase
ClearCommerce
Clearent
CPI Card Group
Conix Systems
Cryptomathic
CyberSource
Datacard
Diners Club
Discover Financial
Euronet Worldwide
Experian
First Data Corp.
FleetCor

Forward Financial
GE Money Bank
GlobalPlatform
Home Shopping Network
HSBC
ICICI Bank
Ingenico
KeyBank
Lehman Brothers
Level Four Americas
Magnum Communications
Magtek
MasterCard
Mobilians
NationalCard Processing
nFinanSe
Newtek Business Services
Nomad Payments
Oberthur Card Systems
Ogone
PayPal
Paymentech
PIC Solutions
PlaNet Finance
POS Supply Solutions
Prime Factors
PSCU Financial Services
Purepay
RBS National Bank
Regions Financial
Retail Decisions
Royal Bank of Scotland
Santander Serfin
Standard Bank
Star Network
Strategies Telecoms
Tarjeta Naranja
Thales
TransFirst
TransUnion
Tricor Pacific Capital
U.S. Bank
Ukash
Unibanco (Unicard)
Unica
Union Tank
Valista
ValuAccess
VeriFone
Visa
Vodafone
Wachovia
Wells Fargo
Western Payments Alliance