A system for processing biometric inputs comprising a point-of-sale system, a transaction processing server, a payment gateway, and a data storage device including a biometric database, the point-of-sale system comprising: (a) a fingerprint reader configured to receive a plurality fingerprint data simultaneously or substantially simultaneously; (b) an input device configured to receive transaction data for a transaction, the transaction data comprising a transaction value; (c) a communication device; and (d) at least one processor in communication with the fingerprint reader, the input device, and the communication device, the at least one processor programmed or configured to: (i) generate a plurality of transaction messages, wherein a separate transaction message is generated for each of a plurality of account identifiers which relate to accounts among which the transaction value is to be apportioned and the plurality of account identifiers correspond to the plurality of fingerprint data received by the fingerprint reader, wherein the plurality of transaction messages for a transaction are based at least partially on the transaction data received by the input device and fingerprint data from the fingerprint reader, the plurality of transaction messages comprising an apportionment of the transaction value among the plurality of account identifiers; and (ii) communicate, with the communication device, the plurality of transaction messages to the payment gateway; wherein the payment gateway is configured to identify an appropriate transaction processing server and communicate transaction messages to the transaction processing server; wherein the transaction processing server is configured to: in response to receiving fingerprint data in each transaction message, search the biometric database to match the fingerprint data with one or more account identifiers that have been registered; and once one or more account identifiers are determined, determine which account identifiers to use to process the transaction and then authenticate the transaction based on the fingerprint data and process the transaction. (a) a fingerprint reader configured to receive a plurality fingerprint data simultaneously or substantially simultaneously; (b) an input device configured to receive transaction data for a transaction, the transaction data comprising a transaction value; (c) a communication device; and (d) at least one processor in communication with the fingerprint reader, the input device, and the communication device, the at least one processor programmed or configured to: (i) generate a plurality of transaction messages, wherein a separate transaction message is generated for each of a plurality of account identifiers which relate to accounts among which the transaction value is to be apportioned and the plurality of account identifiers correspond to the plurality of fingerprint data received by the fingerprint reader, wherein the plurality of transaction messages for a transaction are based at least partially on the transaction data received by the input device and fingerprint data from the fingerprint reader, the plurality of transaction messages comprising an apportionment of the transaction value among the plurality of account identifiers; and (ii) communicate, with the communication device, the plurality of transaction messages to the payment gateway; (i) generate a plurality of transaction messages, wherein a separate transaction message is generated for each of a plurality of account identifiers which relate to accounts among which the transaction value is to be apportioned and the plurality of account identifiers correspond to the plurality of fingerprint data received by the fingerprint reader, wherein the plurality of transaction messages for a transaction are based at least partially on the transaction data received by the input device and fingerprint data from the fingerprint reader, the plurality of transaction messages comprising an apportionment of the transaction value among the plurality of account identifiers; and (ii) communicate, with the communication device, the plurality of transaction messages to the payment gateway; wherein the payment gateway is configured to identify an appropriate transaction processing server and communicate transaction messages to the transaction processing server; wherein the transaction processing server is configured to: in response to receiving fingerprint data in each transaction message, search the biometric database to match the fingerprint data with one or more account identifiers that have been registered; and once one or more account identifiers are determined, determine which account identifiers to use to process the transaction and then authenticate the transaction based on the fingerprint data and process the transaction. in response to receiving fingerprint data in each transaction message, search the biometric database to match the fingerprint data with one or more account identifiers that have been registered; and once one or more account identifiers are determined, determine which account identifiers to use to process the transaction and then authenticate the transaction based on the fingerprint data and process the transaction.