Abstract: In general, in one aspect, an electronic payment transaction can be processed at a merchant location without the need for configuring the equipment used to include parameters related to a merchant account (merchant profile). The electronic payment transactions processed from the merchant location simply include a unique identification for the equipment. A processing switch upstream maintains a correlation between the unique identifiers and the merchant profiles and retrieves the appropriate merchant profile for the unique identification and utilizes the merchant profile to process the electronic payment transactions.