An authentication method includes assigning a risk status to a request received from a remote interaction system, transmitting a notification communication to a device associated with the request, monitoring interaction data from an interaction network, and identifying, from the monitored interaction data, authentication interaction information, the authentication interaction information including a coded sequence and a predetermined authentication identifier. The authentication method also includes comparing the coded sequence in the authentication interaction information to an expected coded sequence and transmitting a verification communication after determining the coded sequence in the authentication interaction information matches the expected coded sequence.