Signa selfie

In the on-line dating game, a signa selfie is a selfie used to establish the identity of Jack at the request of Jill, with the help of a piece of paper on which is written by Jack a text requested by Jill. The presence of the written words is the essence of the signa; without which the photograph is simply a selfie. With the help of a signa selfie, Jack can establish his identity to reassure Jill that he is real.