The deal is set to be worth around â¬400 million ($500 million), reports the Financial Times.
RBS is undergoing a program of divestment, as it looks to improve the state of its capital reserves by ridding itself of non-core businesses.
The bank is also said to be close to selling off its US private equity fund portfolio for about $200 million, as well as divesting more than 300 bank branches to Santander, BBVA and National Australia Bank.
In December, the European Commission ordered RBS to sell off several assets in order to balance the bailout payments the bank received from the British government.
Competition Commissioner Neelie Kroes warned at the time: "Be aware that in case RBS does not deliver on its balance sheet reduction targets by 2013, the commission will be able to intervene again and more divestments will be required."
By Tony Aynsley