The webinar is set to explore the importance of whistleblowing and the challenges that whistleblowers experience.
The South African Revenue Service (Sars) also obtained a similar prevention order, which seized R60 million.
The report was expected to be tabled at the ANC’s next national executive committee (NEC) meeting for consideration.
It has also emerged that Dr Mkhize’s son benefited from the proceeds of the irregular tender.
Mr Ramaphosa insisted he wanted the full truth about the allegations involving Dr Mkhize and the company Digital Vibes.
This comes after the Justice department placed two senior officials on precautionary suspension over suspicions of tender fraud.