3Delta Systems 
Accuity
ADP, Inc.
ADT Security Services
AIG American General
Alacriti, Inc.
Allegheny Energy
Allstate Insurance Company
American Express
Association for Financial Professionals
AT&T Services
Atmos Energy Corporation
BB&T
BancVue Ltd.
Bank of America
BillFloat
Billtrust
BNY Mellon
Bottomline Technologies,Inc
Capital One Financial Corporation
Cardinal Venture Capital
CashEdge, Inc.
Charles Schwab & Co. Inc.
Clear2Pay
Coca-Cola Enterprises, Inc.
Consolidated Edison
Corporation Service Company
Cox Communications, Inc
DBC, LLC
Digital Insight
Discover Financial Services
Dollar Bank FSB
Dominion Virginia Power
DST Output
eCom Advisors, LLC
EastPay,Inc.
eBillMe (MODASolutions)
Elavon
Entergy Services, Inc.
EPCOR
Exelon Corporation
Federal Reserve Bank of Atlanta
Federal Reserve Bank of Cleveland
Fidelity Express Financial Services
FIS
Fiserv
GMAC Mortgage Corporation
Harris, NA 
Highmark Blue Cross Blue Shield of PA
HSBC Bank, USA
Intuit
iPay, LLC
IPP of America, Inc.
J & B Software

 

Javelin Strategy & Research
Johnson & Johnson
JPMorgan Chase
KeyBank 
KUBRA
MasterCard RPPS
National Biweekly Administration
National Grid
NCO Financial Systems, Inc.
NCR
NEACH
Online Resources Corp.
PaymentVision
Paystream Advisors
Phoenix Payment Systems
Pillsbury Winthrop Shaw Pittman
PM Systems
PNC Bank
Portland General Electric
PreCash, Inc. 
Prudential Insurance
Qwest Communications
Regulus Group, LLC
RBC Bank USA 
RBS Citizens Bank
Sallie Mae
SHAZAM, Inc.
Southern California Edison
State Farm Insurance Company
Sterling Commerce
SunGard AvantGard
SWACHA- The Electronic Payments Resource
Sybase Financial Fusion
T-Mobile
The Bancorp Bank
The Clearing House
Think Computer Corporation
Tier Technologies 
Transactis, Inc.
Travelex Global Business Payments
Upper Midwest ACH Association UMACHA
Union Bank 
University Bank
U.S. Payments Corp., LLC
US Bank
Verizon
Wal-Mart Stores, Inc.
Wells Fargo Bank
Western Payments Alliance (WesPay)
Western Union Payment Services
Xcel Energy
Yodlee, Inc.
Zenith Information Systems, Inc.