Citibank's latest battle over accidental Revlon loan repayment

Citibank says that Revlon owes it $500 million. Revlon — currently operating under bankruptcy protection — would love to not owe Citi anything. So Citi has sued Revlon, in an attempt to get a judge to say that the debt is real. Why it matters: Citi lost $500 million thanks to its own antiquated technology and a key legal precedent involving a French institution with the…