3C Communications
ABN Amro
Accenture
Accor Services
AccountNow
Ace Cash Express
AirPlus International
Amazon
American Express
AmSouth Bank
Apollo Enterprise
Ariba
Bank of America
Barclays Bank
BB&T
Bell ID
BP
British Telecom
Cadence Bank
Capital One
Charming Shoppes
Chase Paymentech
CheckFreePay
Chevron
China CITIC Bank
China UnionPay
Chunghwa Telecom
Citibank
Clear2Pay
Credomatic International
CyberSource
Danal Inc.
Deutsche Bank
Digital River
DirecTV
Discover Financial Services
Driver's License Guide Co.
eBiz Mobility
Electronic Payments
Emirates Bank
Empiria Group
EnterCard
EON Bank
Equifax
Evertec
eWise Systems
Experian
ExxonMobil
Fifth Third Bank
Finansbank
First Atlantic Commerce
First Data
First Nat'l Merchant Serv.
FleetCor
Frost Bank
GE Capital
Giant Eagle
Global Express
Global Payment Systems
Goldman Sachs
Green Dot Corp.
GRP Partners
Harvard Univ. Empl. CU
High Payment Systems
HSBC Bank
Hypercom
iDcentrix
IPP
JCB International
JourneyPay
JPMorgan Chase

Kessler Group
LG Card
Lloyds TSB Cardnet Merch. Svc.
MasterCard
Meijer
Mellon Bank
Merchant Processing Inc.
MicroBilt
Millenium BCP
Mobilians Int'l
MoneyGram
NACHA
National City Bank
Nationwide Building Society
NetDeposit
Netgiro
Newtek Business Services
Nokia
Nordea
Nova Information Systems
Oracle
Pay-O-Matic
PayLife Bank
PayPal
PayPoint
Pelorus Group
Philliou Selwanes Partners
Planet Payment
PNC
PrePay Technologies
PrivatBank
Pulse
Raiffeisen Landesbank
RBS Lynk
Regions Bank
Retail Decisions
Safeway
Saks
SAP
Saylent Technologies
Shell
Sinsys
SK Telecom
SmartClixx
Solvit Software
Southwest Airlines
Standard Chartered Bank
Strawhecker Group
SunTrust Bank
T-Chek
Target
Telekurs
Telrock Communications
Ticketmaster
TransFirst
TransUnion
Trustwave
TSYS
U.S. Bank
Union Bank of Taiwan
VeriFone
Virgin Money
Visa
Wal-Mart
Washington Mutual
Wells Fargo
Western Union
Wright Express
Xign
Yodlee