A former JP Morgan Chase private banker has filed a new whistleblower complaint against his erstwhile employer, alleging it ignored many red flags about a suspicious client even after the fraud of another client, Bernard Madoff, reports Reuters.

Jennifer Sharkey alleges executives including private wealth management head Joe Kenney "continually ignored" concerns she voiced first in January 2009, the month after Madoff's Ponzi fraud came to light.

In a complaint amended at the instance of the court, Sharkey said the bank dismissed her in August 2009 because of the part she played in an internal investigation into an unnamed Israeli client's alleged involvement in mail fraud, bank fraud and money laundering.

Sharkey said she raised many concerns, including that the client had various businesses for which he did not provide documentation and did business with Colombia despite JPMorgan's ban on transactions with that country.

She also said the client had a "several million dollar" trading account in the name of a law firm that funneled money into JPMorgan commercial checking accounts, activity that the private wealth management unit "had no means of tracking."

"We believe this claim has no merit whatsoever, and we intend to ask the court to dismiss the amended complaint," a spokesperson for JP Morgan Private Bank told this publication. 2Ms Sharkey’s claims have been dismissed twice previously, first by the Department of Labor and then by the Federal Court for the Southern District of New York," the spokesperson added.