Charliemopps writes The Federal Trade Commission has filed suit against Amazon for illegally billing parents for in-app purchases of digital goods prior to requiring a password for making purchases. "The FTC's complaint, filed Thursday, asks the court to force Amazon to refund the money to those customers. In-app purchases typically involve virtual goods bought within an app, like extra coins or energy in a game, according to the FTC. Some bills totaled hundreds of dollars, and some virtual goods cost as much as $99.99." We recently told you about Amazon's refusal to reach a settlement over these FTC complaints.