Systems and methods for biometrically identifying an individual for purchasing a product and/or service without a need for the individual to input authentication data into a system/device are described. Data representative of a scanned iris of a customer desiring to make a purchase may be made. The customer may be identified based upon the scanned iris. A determination may be made as to whether the identified customer has a plurality of accounts at a financial entity. Information of a selected account to make the purchase may be received. Sufficient funds in the selected account to make the purchase may be determined. If insufficient, a different account may be identified to make the purchase. Sufficient funds in the different accounts may be determined and funds in the different accounts may be decreased by the associated payment amount.