Payment Processing - Mercury Payments
Why Mercury?
http://www.mercurypay.com/go/windward/merchants.html
Setting up Mercury Payments
Credit Card swiping on the SC550
DSIClient.ocx not found Error
Manual Batch Closing with Mercury
Paying an Invoice using a Credit Card and Payments on Account
Pin Pad Setups - Canadian Merchants
Reprinting a Credit or Debit Card Slip
Credit / Debit / Gift receipt setup
How to enter the NICKNAME variable in the Mercury Payment section of System Five