Qadha of Sajdah and Tashahhud that is forgotten
1273. If a person forgets Sajdah and Tashahhud, and offers its Qadha after prayers, he should fulfill all the conditions of prayers, like his body and dress being Pak, and facing the Qibla and all various other conditions.
1274. If a person forgets Sajdah a few times, if he forgets one Sajdah in the first Rakat and another in the second Rakat, after the prayers, he should perform the Qadha of each one of them. It is not necessary for him/her to make it clear which one is Qadha of which act.
1275. If one forgets one Sajdah and Tashahhud, as an obligatory precaution, he/she must first perform Qadha for the first act which is forgotten and if he/she does not know which one has been forgotten, as a precaution, he/she must perform one Sajdah and Tashahhud and then another Sajdah, or one Sajdah and one Tashahhud until he/she becomes certain that he/she has offered Qadha of those act which are forgotten in the proper manner.
1276. If one performs Qadha of Sajdah first, thinking that it was forgotten first, but after offering Tashahhud, he/she remembers that Tashahhud was forgotten first, as an obligatory precaution, he/she must offer Qadha for Sajdah again; and if one performs Qadha of Tashahhud first and after Sajdah, he/she remembers that Sajdah was forgotten first, as an obligatory precaution, he/she must offer Tashahhud again
1278. If one remembers after Salam of Namaz that he/she has forgotten one Sajdah of the last Rakat, he/she must perform the forgotten Sajdah and then two Sajdatus Sahv, whether he/she has done something which invalidates Namaz or not, and if he/she has forgotten Tashahhud of the last Rakat, he/she must offer Qadha of Tashahhud and then two Sajdatus Sahv.
1279. If between the Salam of Namaz and Qadha of Sajdah or Tashahhud, one performs an act, which requires Sajdatus Sahv, like talking forgetfully, he/she must offer Qadha of Sajdah or Tashahhud.
1280. If a person does not know whether he has forgotten Sajdah or Tashahhud, he/she must perform Qadha for both. It does not matter which one is offered first.
1281. If a person doubts whether or not he has forgotten to perform Sajdah or Tashahhud, it is not obligatory for him to perform its Qadha.
1282. If a person knows that he has forgotten Sajdah or Tashahhud, but doubts whether or not he has performed it before the Ruku of the succeeding Rakat, the obligatory precaution is that he should perform its Qadha
1283. If it is obligatory on a person to perform Qadha of Sajdah, and owing to some other act, Sajdatus Sahv also becomes obligatory upon him, he should first perform the Qadha of Sajdah after prayers, and then perform Sajdatus Sahv.
1284. If a person doubts whether or not he has given the Qadha of the forgotten Sajdah or Tashahhud after the prayers, and if the time for the prayers has not lapsed, he should give the Qadha. In fact, even if the time of Namaz has lapsed, he should, as an obligatory precaution, give the Qadha.