A system for authenticating the identity of a caller (i) receives a phone call from a caller, where the phone call is initiated through an application on a remote computer device associated with the caller, and where the phone call includes one or more phone authentication credentials; (ii) determines a preliminary identity of the caller based upon the one or more phone authentication credentials; (iii) receives online authentication credentials from the application on the remote computer device; (iv) determines a confirmed identity of the caller based, at least in part, upon the one or more online credentials and the preliminary identity of the caller; and (v) displays the confirmed identity of the caller to a user answering the phone call. As a result, the user and/or the system do not need to perform additional authentication before providing service to the caller.