An investigation into false billing by service providers needs to be done urgently, Public Protector Thuli Madonsela said on Wednesday.

Addressing the Institute of Municipal Finance Officers (IMFO) in Somerset West, Madonsela said over-billing and false billing would eventually cripple the state.

She warned that the extent of the problem was huge, but said a thorough investigation could quantify exactly how much the state was losing by overpaying service providers.

The Public Protector more here: Public protector warns over-paying will harm state