The above is a practice in Cape Town. Is there any basis in any of the mathaahib for it? After person A taps person B, person A begins to read as if he is imaam.
At the outset, it should be understood that the Imaam making Niyyat of being Imaam is not a condition for the validity of following him. Thus, even if he doesn’t know that he has been made Imaam, following him will be correct.
It would be better to inform him by not disturbing him, then such a manner should be adopted otherwise the prevalent practice of tapping him could be used. We are unaware of the standpoint of other Madhaahib on this issue.
and Allah Ta’ala Knows Best
Mufti Ebrahim Desai