A method and system for processing DDA payment transactions including generating a private virtual identifier, associating the private virtual identifier with a DDA, and generating a public virtual identifier associated with the private virtual identifier. The method can also include distributing the public virtual identifier to consumers, receiving a DDA payment request from a billing entity including the public virtual identifier, retrieving the private virtual identifier in response to receipt of the public virtual identifier, and processing the DDA payment request using the private virtual identifier to facilitate payment to the billing entity on behalf of the consumer. The method and system also authenticates the identity of a user during a transaction.