SunGard’s Ambit System Access CardPro for Islamic Banking can help Islamic banks provide interest-free Sharia’h- compliant card products with some or all of the following salient features:

• No interest is charged on outstanding balance

• Credit is limited to and guaranteed by funds coming from the customer’s account that is based on a Wadiah contract or other deposits of the customer in the Islamic bank

• Total profit chargeable over the card’s duration is fixed at the start

• Sharing of card operations cost with cardholders

• Additional funds can be made available to customers through a Qard Hassan contract

• Administration Fees calculation can include the ratio between the previous month’s operating costs and outstanding balance.

• Variable fees can be charged to guarantee purchase payments to merchants or as a fee for the provision of the credit facility

Source: http://www3.sungard.com/ambit/documents/Brochure%20-%20Card%20Management%20for%20Islamic%20Banks.pdf