Does conveying information about a young man, with whom a girl had a previous relationship, possessing a picture of her now that she is married, constitute qadhf (slanderous accusation of illicit sexual relations), or backbiting and tale-bearing?

The ruling on transmitting speech varies according to the intention. If the intention is good, there is no harm. If it is intended to disgrace and mention a person with what they dislike, then it is backbiting (gheebah). If it is intended to cause discord between two people, then it is slandering (nameemah). This speech is not considered a false accusation (qadhf).