Answered by Shaykh Amjad Rasheed
Is it recommended to wipe the back of the neck in the Shafii school?
The imams of the Shafi`i school differed regarding this. The position chosen by Imam Nawawi and most of the scholars of discernment (al-ashab) to be relied upon is that is not a sunna to wipe the back of the neck in wudu. This is the relied upon position (mu`tamad) of the school.
A number of the early imams of the Shafi`i school said that wiping the back of the neck is a sunna. Among those who said this are Imam Qadi Husain, Mutawalli, Baghawi, and Ghazali. Thus, however wishes to follow them in this may do so.
– Amjad Rasheed.
(Translated by Faraz Rabbani)