A class action lawsuit has been filed against the Nano and its core team by a US law firm in behalf of the investors that alleges Nano of violating the federal security laws for unregistered selling of securities and leading investors to the exchange, BitGrail which suffered a hacking attack to lose million of XRB ( nano cryptocurrency  ) in February 2018.

A cryptocurrency investor law firm in the USA has filed a class action lawsuit against Nano (previously known as RaiBlocks (XRB) on behalf of Nano investors in the United States District Court, Eastern District of New York.