1- can i allowed to do sajda e sahw for any type mistake in fard salah ??
2- if there was no mistake and i do sajda e sahw in a confusion….do i have to repeat my fard salah ???
Wa’alaykum as Salam wa rahmatullahi wa barakatuhu,
1) No, you cannot just make Sajda Sahw for any type of mistake. Rather, you will first have to establish what kind of error it is.
If you missed out a Fardh action, intentionally or unintentionally, the Salah breaks and cannot be remedied with Sajda Sahw.
However, if a person unintentionally delays a Fardh or Wajib action or if he unintentionally changes the sequence of a Fardh or Wajib act, he may make Sajda Sahw, and his Salah will be correct. Similarly, if one unintentionally leaves out a Wajib act, he may rectify his prayer by performing Sajda Sahw.
If a person makes a mistake or omits a Sunnah or Mustahab (preferable) action of Salah, then his Salah will still be correct, and he does not have to perform Sajda Sahw.
2) You do not have to repeat those prayers where you done Sajda Sahw for no reason.
And Allaah Ta’aala knows best
Ismail Moosa (Mufti)
وَلَا يَجِبُ السُّجُودُ إلَّا بِتَرْكِ وَاجِبٍ أَوْ تَأْخِيرِهِ أَوْ تَأْخِيرِ رُكْنٍ أَوْ تَقْدِيمِهِ أَوْ تَكْرَارِهِ أَوْ تَغْيِيرِ وَاجِبٍ بِأَنْ يَجْهَرَ فِيمَا يُخَافَتُ وَفِي الْحَقِيقَةِ وُجُوبُهُ بِشَيْءٍ وَاحِدٍ وَهُوَ تَرْكُ الْوَاجِبِ، كَذَا فِي الْكَافِي. (الفتاوي الهندية – 1 / 126)
This answer was collected from Fatwaa.com which is an excellent Q&A site managed by Mufti Ismail Moosa from South Africa. .