A class action lawsuit was filed on March 4, 2104 in the US District Court, Southern District of New York, Manhattan. The caption is Maher v. Bank of Nova Scotia, 14-cv-01459, U.S. District Court, Southern District of New York (Manhattan).
The articles can be found on a google search, see here, for example.
I went to the pacer site and pulled the complaint. I breezed through it quickly.