Section I: The Definition of the Prostration of Forgetfulness, Its Ruling, and Who is Obliged to Perform It
Firstly: Definition of the prostration of forgetfulness
The prostration of forgetfulness consists of two prostrations that make up for a shortcoming in prayer due to forgetfulness.
Secondly: Ruling of the prostration of forgetfulness
The prostration of forgetfulness is wajib in general. This is the authentic position of the Hanbali
and Hanafi schools, and one position among Malikis. It is the position of al-Thawri, Ibn al-Mundhir, and Ibn Hazm. It was chosen by Ibn Taymiyyah, Ibn Baz, and Ibn `Uthaymin.
Thirdly: Who is obliged to prostrate due to forgetfulness
The prostration of forgetfulness is the duty of one praying alone and the imam.
Consensus on this was related by Ishaq ibn Rahawayh, Ibn Rushd, Ibn Qudamah, and al-Nawawi.
Fourthly: Prostration of forgetfulness for one who suffers from chronic doubts
One who suffers from chronic doubts does not perform the prostration of forgetfulness due to mere doubts in their prayer. This is by agreement of the four schools of jurisprudence.