Her family came from Tropoja and settled close to Prizreni, then in the Kingdom of Serbs, Croats, and Slovenes.
After completing her elementary education she attended three night-shift classes, training to become a tailor.
Kati was arrested by Yugoslav authorities in 1947 and taken before a court together with her brother Lazer, as members of Albania National Democratic Organization and enemies of the people.
38 members of "Hamdi Berisha Group", all of them from Uroševac and vicinity, were arrested and tried in Gnjilane (Gjilan), from 1–7 February 1947; Katarina Josipi was the only woman.
[2] Katarina Josipi acted on stage for the first time at the Amateur Theater in Uroševac.