Personal tragedies which have befallen five Mpumalanga men prompted them to take a 319km journey to .
"Advocate Thuli Madonsela will release her final report on the investigation into allegations of improper conduct and maladministration relating to security installations and upgrades at the private residence of President Zuma," spokeswoman Kgalalelo Masibi said.
A media briefing was scheduled for March 19 at her office in Pretoria.
More than R200 million was allegedly used for what was described as security upgrades at the Nkandla residence in KwaZulu-Natal.
In November, the Mail&Guardian reported that Madonsela had found in her preliminary report that Zuma had misled Parliament and benefited substantially from the upgrade.
An inter-ministerial task team report on the Nkandla expenditure was released in December, after it was declassified, confirming that a total of R206,420,644 was spent on the upgrade.
Public Works Minister Thulas Nxesi, who initially classified the report, said at its release that allegations that Zuma had used State resources to build and upgrade the residence were unfounded.
In January, the newspaper reported that a leaked public protector letter showed that former top cop Bheki Cele failed to stop wasteful expenditure at the Nkandla home.