What is The Shafi’i Ruling On Reciting Qunut in Fajr Prayer, And is The Prayer Valid if Omitted When Following A Hanafi Imam?

What is the ruling on recitation of the invocations of Qunut in the fajr prayer according to the Shafi’i school? Would a person’s prayer be valid if he does not recite these invocations while performing fajr prayer by following a Hanafi imam?

In Shafi’i school, it is a strong sunnah to recite the Qunut duas after standing up after performing ruku in the last rakat of the fardh of fajr prayer. When a Shafi’i person follows a Hanafi imam, s/he recites the Qunut duas as s/he stands up after ruku if s/he has time. If one does not have enough time to recite it, s/he does not recite it but performs sajdah al-sahw after the prayer independently, according to the strong opinion within the school (Nawavi, al-Majmu’, IV, 290). However, his/her prayer will be valid even if s/he does not perform sajdah al-sahw.

Source: Presidency Of Religious Affairs The Turkey, High Board of Religious Affairs FATWAS