Was the title Karramallahu wajhah for Imam Ali given by the Prophet or by others, and does it originate from the Shia?

Summary

Scholars hold two views. One group discourages the title because it rejects the Shia exaltation of Ali and because other companions are equally deserving, so Radhiallahuanhu should be used for all. The other group permits it because Ali never prostrated to idols, other companions also have special titles, and the phrase arose as a Sunni response to the Nawasib. The fatwa holds that using it is not wrong, but prefers using Radhiallahuanhu for Ali as for other companions, to avoid the disagreement.

Written in our own words from the original fatwa — check the source before acting on it.