Brussels, 30/10/2003 (Agence Europe) - The MasterCard bank card group should justify its invoicing methods to the European Commission, more specifically the commissions charged by the group to perform electronic transfers between the retailers banks and those of customers. In fact the European executive confirmed the sending of warning letters on this matter, having noted that retailers were forced to pay disproportionate prices to use the payment system. We are concerned by the high fees...