The rail and logistics parastatal also said it was suing former chief executive Siyabonga Gama to the tune of R323 million, comprising R41.4m paid to Gutpta-linked Trillian for work not done, R189m paid to another Gupta-linked firm, Regiment, for work not done, and a further R93m paid in fictitious invoices under his watch.
Transnet also wants Gama predecessor Brian Molefe to pay it back R79m for payments made to Regiments for work not done.
The company's former treasurer, Phetolo Ramosebudi, is also facing a bill of R282.7m from illegal payments to Trillian and Regiment.
Molefe said that China South Rail, which was controversially awarded R54bn to deliver nearly 1 100 locomotives, had already paid back R618m of the R700m that was paid in advance.