Which actions in prayer must a follower (makmum) perform in conformity with the imam?

Summary

A follower must conform to the imam in recommended acts whose difference would create a large and obvious discrepancy, such as the prostration of recitation. That prostration must be followed whether the imam performs or omits it, the forgetfulness prostration must be followed if the imam performs it, and the first tashahhud must be followed if the imam omits it. Recommended acts that do not cause a major discrepancy, such as the resting sit and the qunut supplication, do not require conformity. A follower's prayer is invalid if he knowingly and deliberately differs in a matter that must be followed.

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