The World Federation One Stop Fiqh

Ruling 1214

If while performing ṣalāt al‐iḥtiyāṭ one has a doubt about one of the acts, in the event that its time of performance has not passed, he must perform it; and if its time of performance has passed, he must dismiss his doubt. For example, if he doubts whether or not he has recited Sūrat al-Ḥamd, in the event that he has not yet gone into rukūʿ he must recite it, but if he has gone into rukūʿ he must dismiss his doubt.