Must a person repeat prayers and fasting if they were negligent in learning the Shar'i matters related to acts of worship and then learned them?

One must make up prayers that were certainly invalid due to a deficiency in some of their conditions or pillars—even if this is a point of scholarly disagreement—in order to exit the disagreement, and this is the view of the majority. As for one who is certain that he committed an act that invalidates fasting out of ignorance, the preponderant view is that he is not required to make it up. As for one who doubts whether he committed an act that invalidates his prayer or fast, nothing is required of him, because doubt regarding an act of worship after completing it does not affect its validity.