Deripaska's representative announced in March past year when the cooperation between the businessman and President Donald Trump's former campaign manager became the subject of attention of foreign media that there were contracts with Manafort which are now involved in litigation.
The legal action is another headache for the two men, who are already under criminal indictment by Robert Mueller, the special counsel who is investigating possible co-ordination between Mr Trump's campaign team and Russian Federation.
Russian billionaire Oleg Deripaska's Surf Horizon Ltd. has filed a suit in New York State court against Paul Manafort and Rick Gates, a spokesperson for the Russian businessman told Interfax. The lawsuit was filed in a NY state court.
It cites Mueller's indictment as "further support for Surf's realization" that Manafort and Gates had used their companies to "wrong Surf".
Manafort and Gates were both charged in October with money laundering and failing to register as foreign agents, among other charges, arising from their previous business dealings unrelated to the Trump campaign.
Surf Horizon is asking $1.1 million in compensatory damages and $25 million in punitive damages.
Lawyers for Manafort and Gates could not immediately be reached for comment. A separate lawsuit dating back to 2015 was ongoing when the pair joined the Trump campaign, according to Reuters, and the Post noted that a similar case was filed in 2014 in the Cayman Islands.
"We are surprised by this filing", said Jason Maloni, president of public relations firm JadeRoq and a spokesman for Manafort.
Deripaska has always been after Manafort and Gates for the allegedly stolen money. "This is a commercial matter which we thought had been addressed and resolved years ago".
Manafort sues, calling Mueller actions rogue
Paul Manafort , President Trump's former campaign chairman, sued the Department of Justice; the deputy attorney general, Rod J. The crux of the complaint revolves around the Justice Department regulations that created the special counsel post .