The player was cited for allegedly stamping on Free State Cheetahs flank Pieter Labuschagne in their Currie Cup semi-final at Kings Park in Durban on Saturday. He received a yellow card in the 65th minute for the incident.
Advocate André Oosthuizen reserved his judgment on the matter on Monday. He cleared Du Plessis of the charge on Tuesday.
In his judgment, Oosthuizen ruled that based on the facts before him by the player and assistant referee Cobus Wessels, as well as the video footage viewed during the enquiry, the contact Du Plessis made with Labuschagne was accidental.