The retail giant ignored fraudsters’ use of its money transfers in consumer scams that cost victims hundreds of millions of dollars, according to the Federal Trade Commission. Walmart called the agency’s lawsuit “factually flawed and legally baseless.”

Karl K. Klessig provided a fraudulent loan document and forged a signature in an application last year to acquire control of Golden Pacific Bancorp, according to the Federal Reserve.

The data breach, which occurred over a two-day period last December, is the largest disclosure by a mortgage lender this year.

The firms respectively settled the regulator’s allegations about suspicious activity reports and the duty of best execution — two major areas of emphasis.