Etiquettes of correcting Imam mistake (in recitation) during Salah?
Question Does anyone know where I can find details on the etiquettes of correcting a mistake (in recitation) during Salah? Answer: ﺑﺴﻢ اﷲ اﻟﺮﺣﻤﻦ اﻟﺮﺣﯿﻢ In the name of Allah, the Most Gracious, the Most Merciful
There are some etiquettes mentioned in Umdatul Riayah which is the hashiya (commentary) of Sharhul Wiqayah in the chapter of Salah; That Which Invalidates the Prayer and What is Disliked Therein. 
Only Allah knows best
Written by Maulana Mohammad Ahsan Osmani Checked and approved by Mufti Mohammed Tosir Miah Darul Ifta Birmingham
1 Sharhul Wiqayah/ Umdatul Riayah: p. 179, v. 2 (Qadeemi Kutub Khana)