The process of the Seriti Commission, which found that there was no evidence of corruption in the "arms deal", was flawed, the Gauteng High Court in Pretoria heard on Tuesday.
"We know that there is a constitutional obligation to combat corruption and to combat it, is to expose it.
"The commission was set up to find out if corrupt activities took place in the arms deal and found that there was none. However, the commission did not investigate properly," advocate Geoff Budlender, SC, argued on behalf of organisations Right 2 Know (R2K) and Corruption Watch (CW).
6 key findings of arms deal commission
Budlender highlighted several "topics of failure" in the manner in which the commission gathered and considered relevant material and evidence.
In his heads of argument, Budlender also stated that the commission failed to consider two thirds of documents from the Scorpions and the Hawks.
"The commission received an internal hard drive containing approximately 1.3 million pages of documents relating to the criminal investigations.
"This was one third of the documents in the containers which were deemed relevant to the commission's investigation. The commission did not consider the remaining two thirds of the documents," he said.
In addition, the commission did not access and consider relevant records of criminal proceedings, Budlender added. He was referring to matters raised in the Schabir Schaik trial as well as the investigation and criminal proceedings against Zuma.