Professor Tofty was a member of the Wizarding Examinations Authority, one of the examiners for O.W.L. exams at Hogwarts in 1996. He was the examiner for Harry during his practical Astronomy, Charms, and Defense Against the Dark Arts O.W.L.s and History of Magic theory O.W.L. (OP31).
Tofty had been told by his friend Tiberius Ogden that Harry Potter could produce a Patronus, and asked Harry to show him for a bonus point on his Defense Against the Dark Arts O.W.L. (OP31).