Public Protector Thuli Madonsela is to release a report on her probe into the Western Cape government on Friday.
She will brief the media at the International Convention Centre in Brummeria at 11am.
Two weeks ago, her office said she would consider submissions from the Western Cape government and all the complainants on a communication tender before making her findings public.
This, after the leaking of Madonsela's provisional report to newspapers a week before a deadline for the province's response.
In the draft report, Madonsela reportedly found that a tender awarded to advertising agency TBWA/Hunt Lascaris in 2010 to centralise communications was invalid.
The province's Premier Helen Zille condemned the leak and defended the tender. She said the leak prejudiced the province's right to rectify what it described as "material legal errors" in the draft report, before it was finalised.
Madonsela later held separate meetings with Zille and the complainants.
The complainants are the African National Congress, the Congress of SA Trade Unions, civil society organisation Ndifuna Ukwazi and a general member of the public, Sulyman Stellenboom.