During an interview to the Italian public television, Vittorio De Sica stated that the movie was shot in 33 days and edited in 10. Producer Moris Ergas wanted it ready for the Venice Film Festival in August. It won the award as "Best Picture".
The real-life con-man who impersonated Della Rovere was named Bertont. In the book the name was changed to Bertone, and finally ended up as Bardone in the film.