Liaison office of Grand Ayatullah Sayyid Ali Al Sistani (L.M.H.L) in London, Europe, North and South America.
1176. The following doubts should be ignored:
Doubt about an act whose time of performance has already passed, like,
during Ruku a person doubts as to whether he did or did not recite Surah
al-Hamd,
Doubt occurring after the Salam of prayers,
Doubt after the time of prayers has already passed,
Doubt of a person, who doubts too much,
Doubt by the Imam (one who leads the congregation prayers) about the
number of Rak'ats when the ma'mum (follower) is aware of the number, and
similarly the doubts of the ma'mum when the Imam knows the number of
Rak'ats.
Doubt which occurs in Mustahab prayers and Namaz of Ihteya.