In what may become another blow to the credibility of public protector Busisiwe Mkhwebane, the Constitutional Court will decide on Monday whether she must personally pay the costs orders made against her by the high court in its ruling on her investigation into the Reserve Bank’s apartheid-era Bankorp bailout.

The Reserve Bank, Absa, the finance minister and the Treasury instituted a review application in the high court in 2018 to set aside certain paragraphs of Mkhwebane’s remedial action recommendations. The applicants argued that the manner in which the investigation was conducted and the recommended remedial action were flawed...