Former Deputy Finance Minister Mcebisi Jonas is expected to be the next witness at the Commission of Inquiry into State Capture when it reconvenes on Friday.
Jonas said some months ago that he had been offered the position of finance minister along with a considerable payment by Ajay Gupta.
The inquiry will adjourn for two days.
On Tuesday, National Treasury official, Willie Mathebula, was testifying on procurement processes.
Mathebula earlier painted a grim picture of the abuse of procurement processes by some government departments.
He says there could be loopholes in the procurement regulatory framework. Mathebula says his office is responsible for regulating procurement and modernising the supply chain systems across all spheres of government.
He says his office also plays an important role in overseeing procurement to improve efficiency and effectiveness.
Mathebula says his office was established in 2013 to ensure that there is transparency in the system and to deal with issues related to the abuse of public procurement.
Corruption and fraud was part of the mandate. But the mandate of his office is mainly to modernise the supply chain system and make sure that it is effective.